Method for transmitting two parallel channels using code division and an apparatus realizing the method
DC CAFC
First Claim
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1. A communications device for the simultaneous transmission of data related to a first channel and data related to a second channel using code division, comprising:
- first spreading means for spreading data related to the first channel using a predetermined first spreading code, second spreading means for spreading said data related to the first channel using a predetermined second spreading code, third spreading means for spreading data related to the second channel using said first spreading code, fourth spreading means for spreading said data related to the second channel using said second spreading code, means for changing the power level of a signal representing the data related to the second channel after the spreading with respect to the power level of a signal representing the data related to the first channel after the spreading, and combiner means to compile a transmission from spread data related to the first channel and spread data related to the second channel the power level of which has been changed, said combiner means comprising;
means for calculating the difference between data related to a first channel spread with a first spreading code, and data related to a second channel, spread with a second spreading code and the power level of which has been changed, and means for calculating the sum of data related to the first channel, spread with the second spreading code, and data related to the second channel, spread with the first spreading code and the power level of which has been changed.
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Abstract
To simultaneously transmit data related to two channels using code division
data related to a first channel (DTCH) are spread parallely using a first spreading code (CI) and a second spreading code (CQ),
data related to a second channel (PCCH) are spread parallely using a first spreading code (CI) and a second spreading code (CQ),
the power level of a signal representing said data related to the second channel (PCCH) after the spreading is changed (G) with respect to the power level of a signal representing the data related to the first channel (DTCH) after the spreading, and
a transmission is compiled from spread data related to the first channel and spread data related to the second channel the power level of which has been changed.
49 Citations
14 Claims
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1. A communications device for the simultaneous transmission of data related to a first channel and data related to a second channel using code division, comprising:
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first spreading means for spreading data related to the first channel using a predetermined first spreading code, second spreading means for spreading said data related to the first channel using a predetermined second spreading code, third spreading means for spreading data related to the second channel using said first spreading code, fourth spreading means for spreading said data related to the second channel using said second spreading code, means for changing the power level of a signal representing the data related to the second channel after the spreading with respect to the power level of a signal representing the data related to the first channel after the spreading, and combiner means to compile a transmission from spread data related to the first channel and spread data related to the second channel the power level of which has been changed, said combiner means comprising;
means for calculating the difference between data related to a first channel spread with a first spreading code, and data related to a second channel, spread with a second spreading code and the power level of which has been changed, and means for calculating the sum of data related to the first channel, spread with the second spreading code, and data related to the second channel, spread with the first spreading code and the power level of which has been changed. - View Dependent Claims (2, 3, 4, 5, 6)
first adding means for calculating the difference between data related to a first channel, spread with a first spreading code, and data related to a second channel, spread with a second spreading code and the power level of which has been changed, a first mixer to multiply said difference by a certain first oscillation signal, second adding means for calculating the sum of data related to the first channel, spread with the second spreading code, and data related to the second channel, spread with the first spreading code and the power level of which has been changed, a phase shifter to generate a second oscillation signal from said first oscillation signal by performing a 90-degree phase shift, a second mixer to multiply said sum by said second oscillation signal, and combining means to combine a signal produced by said first mixer and a signal produced by said second mixer.
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3. The communications device of claim 1, further comprising fifth spreading means for spreading said data related to the first channel using a predetermined third spreading code before said data related to the first channel are spread using other spreading codes, and sixth spreading means for spreading said data related to the second channel using a predetermined fourth spreading code before said data related to the second channel are spread using other spreading codes.
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4. The communications device of claim 1, further comprising means, within said means for changing the power level of a signal, for providing a gain factor to adjust the relative power level of a signal representing data related to the second channel.
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5. The communications device of claim 1, further comprising means, within said means for changing the power level of a signal, for providing a gain factor to adjust the relative power level of a signal representing data related to the first channel.
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6. The communications device of claim 1, further comprising means, within said means for changing the power level of a signal, for providing two parallel gain factors, the first of which is to adjust the relative power level of a signal representing data related to the first channel, and the second of which is to adjust the relative power level of a signal representing data related to the second channel.
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7. A radio communications system for transferring data between terminals and a base station on a multitude of channels using code division, wherein each terminal and each base station comprises at least one transmitter and at least one receiver, said radio communications system comprising within at least one transmitter
first spreading means for spreading data related to a first channel using a predetermined first spreading code, second spreading means for spreading said data related to the first channel using a predetermined second spreading code, third spreading means for spreading data related to a second channel using said first spreading code, fourth spreading means for spreading said data related to the second channel using said second spreading code, means for changing the power level of said data related to the second channel with respect to the power level of data related to the first channel, and combiner means to compile a transmission from spread data related to the first channel and spread data related to the second channel the power level of which has been changed, said combiner means comprising: -
means for calculating the difference between data related to a first channel, spread with a first spreading code, and data related to a second channel, spread with a second spreading code and the power level of which has been changed, and means for calculating the sum of data related to the first channel, spread with the second spreading code, and data related to the second channel, spread with the first spreading code and the power level of which has been changed.
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8. A method for simultaneously transmitting data related to two channels using code division, comprising the steps of:
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spreading data related to a first channel in parallel using a first spreading code and a second spreading code, spreading data related to a second channel in parallel using said first spreading code and said second spreading code, changing the power level of said data related to the second channel with respect to the power level of the data related to the first channel, and compiling a transmission from spread data related to the first channel and spread data related to the second channel the power level of which has been changed, said compiling step comprising the substeps of;
calculating the difference between data related to a first channel, spread with a first spreading code, and data related to a second channel, spread with a second spreading code and the power level of which has been changed, and calculating the sum of data related to the first channel, spread with the second spreading code, and data related to the second channel, spread with the first spreading code and the power level of which has been changed. - View Dependent Claims (9, 10, 11, 12, 13)
calculating the difference between the data related to the first channel, spread with the first spreading code, and the data related to the second channel, spread with the second spreading code, the power level of which has been changed, multiplying said difference by a certain first oscillation signal, calculating the sum of the data related to the first channel, spread with the second spreading code, and the data related to the second channel, spread with the first spreading code, the power level of which has been changed, generating a second oscillation signal from said first oscillation signal by performing a 90-degree phase shift, multiplying said sum by said second oscillation signal, and combining said difference multiplied by the first oscillation signal and said sum multiplied by the second oscillation signal.
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10. The method of claim 8, wherein said data related to the first channel are spread using a predetermined third spreading code before they are spread using other spreading codes, and said data related to the second channel are spread using a predetermined fourth spreading code before they are spread using other spreading codes.
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11. The method of claim 8, wherein, for changing the power level of said data related to the second channel with respect to the power level of the data related to the first channel, the relative power level of a signal representing data related to the second channel is adjusted by a gain factor.
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12. The method of claim 8, wherein, for changing the power level of said data related to the second channel with respect to the power level of the data related to the first channel, the relative power level of a signal representing data related to the first channel is adjusted by a gain factor.
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13. The method of claim 8, wherein for changing the power level of said data related to the second channel with respect to the power level of the data related to the first channel, the relative power level of a signal representing data related to the first channel is adjusted by a first gain factor and the relative power level of a signal representing data related to the second channel is adjusted by a second gain factor.
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14. A method for simultaneously transmitting data related to two channels using code division, comprising the steps of:
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spreading data related to a first channel in parallel using a first spreading code and a second spreading code, spreading data related to a second channel in parallel using said first spreading code and said second spreading code, changing the power level of said data related to the second channel with respect to the power level of the data related to the first channel, and compiling a transmission from spread data related to the first channel and spread data related to the second channel the power level of which has been changed;
and wherein the compiled transmission consists of consecutive symbols, each of which takes a value from a set of allowed values represented as a group of constellation points, said constellation points being situated in the four quadrants of an IQ plane so that in each quadrant the constellation points lie symmetrically with respect to a diagonal intersecting the origin.
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Specification
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Litigation Data
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Current AssigneeConversant Wireless Licensing S.à.r.l. (f/k/a Core Wireless Licensing S.a.r.l.) (MOSAID Technologies Inc. (f/k/a Conversant Intellectual Property Management))
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Original AssigneeNokia Mobile Phones UK Limited (Nokia Corporation)
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InventorsLilja, Harri, Pehkonen, Kari
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Primary Examiner(s)Kizou, Hassan
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Assistant Examiner(s)MEHRA, INDER P
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Application NumberUS09/086,077Time in Patent Office1,153 DaysField of Search370/320, 370/335, 370/342, 370/441, 375/140, 375/146, 375/147US Class Current370/206CPC Class CodesH03M 7/4006 Conversion to or from arith...H04B 10/25754 Star network topologyH04B 7/2628 using code-division multipl...H04J 13/0077 Multicode, e.g. multiple co...H04J 13/16 Code allocationH04L 51/04 Real-time or near real-time...H04L 51/48 Message addressing, e.g. ad...H04L 51/58 Message adaptation for wire...H04L 65/1016 IP multimedia subsystem [IMS]H04L 65/1104 Session initiation protocol...H04N 19/109 among a plurality of tempor...H04N 19/139 Analysis of motion vectors,...H04N 19/625 using discrete cosine trans...H04N 19/91 Entropy coding, e.g. variab...H04W 4/12 Messaging; Mailboxes; Annou...H04W 4/14 Short messaging services, e...H04W 52/30 using constraints in the to...H04W 72/23 in the downlink direction o...H04W 76/12 Setup of transport tunnelsH04W 8/26 Network addressing or numbe...View All
