Automatic power control system for a code division multiple access (CDMA) communications system
DC CAFC
First Claim
Patent Images
1. A method for controlling transmission power levels of a code division multiple access (CDMA) subscriber unit, the method comprising:
- receiving by the subscriber unit a power control bit on a downlink control channel, the power control bit indicating either an increase or decrease in transmission power level;
transmitting a plurality of channels by the subscriber unit, the plurality of channels including a traffic channel and a reverse control channel;
in response to the received power control bit, adjusting a transmission power level of both the traffic channel and the reverse control channel, wherein the transmission power level of the traffic channel and the reverse control channel are different; and
transmitting the traffic channel and the reverse control channel at their respective adjusted transmit power levels.
0 Assignments
Litigations
0 Petitions
Accused Products
Abstract
A receiver receives signals and noise over a frequency spectrum of a desired received signal. The desired received signal is spread using code division multiple access. The received signals and noise are demodulated to produce a demodulated signal. The demodulated signal is despread using a code uncorrelated with a code associated with the desired received signal. A power level of the despread demodulated signal is measured as an estimate of the noise level of the frequency spectrum.
414 Citations
40 Claims
-
1. A method for controlling transmission power levels of a code division multiple access (CDMA) subscriber unit, the method comprising:
-
receiving by the subscriber unit a power control bit on a downlink control channel, the power control bit indicating either an increase or decrease in transmission power level; transmitting a plurality of channels by the subscriber unit, the plurality of channels including a traffic channel and a reverse control channel; in response to the received power control bit, adjusting a transmission power level of both the traffic channel and the reverse control channel, wherein the transmission power level of the traffic channel and the reverse control channel are different; and transmitting the traffic channel and the reverse control channel at their respective adjusted transmit power levels. - View Dependent Claims (2, 3, 4, 5, 6)
-
-
7. A method for controlling transmission power levels of a code division multiple access (CDMA) subscriber unit, the method comprising:
-
receiving by the subscriber unit a series of power control bits on a downlink channel, each power control bit indicating either an increase or decrease in transmission power level; transmitting a plurality of channels by the subscriber unit, the plurality of channels including a traffic channel and a reverse control channel; adjusting a transmission power level of both the traffic channel and the reverse control channel in response to the same bits in the received series of power control bits, wherein the transmission power level of the traffic channel and the reverse control channel are different; and transmitting the traffic channel and the reverse control channel at their respective adjusted transmit power levels. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14)
-
-
15. A code division multiple access (CDMA) subscriber unit comprising:
-
a despreading and demultiplexing device configured to recover a power control bit from a downlink control channel, wherein the power control bit having has a value indicating a command to either increase or decrease transmission power level; and gain devices configured, in response to the received power control bit, to adjust a transmission power level of both a traffic channel and a reverse control channel prior to transmission by the subscriber unit, wherein the transmission power level of the traffic channel and the reverse_control channel are different. - View Dependent Claims (16, 17, 18, 19, 20)
-
-
21. A code division multiple access (CDMA) subscriber unit comprising:
-
a despreading and demultiplexing device configured to recover a series of power control bits from a downlink channel, wherein each power control bit has a value indicating a command to either increase or decrease transmission power level; and gain devices configured, in response to the received series of power control bits, to adjust a transmission power level of both a traffic channel and a reverse control channel in response to same bits in the received series of power control bits prior to transmission by the subscriber unit, wherein the transmission power level of the traffic channel and the reverse control channel are different. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28)
-
-
29. A method for controlling transmission power levels of a code division multiple access (CDMA) subscriber unit, the method comprising:
-
receiving by the subscriber unit a power control bit on a downlink control channel, the power control bit indicating either an increase or decrease in transmission power level; transmitting a plurality of channels by the subscriber unit, the plurality of channels including a traffic channel and a reverse control channel; in response to the received power control bit, adjusting a transmission power level of both the traffic channel and the reverse control channel, separately adjusting the transmission power level of the traffic channel and the reverse control channel; and transmitting the traffic channel and the reverse control channel at their respective adjusted transmit power levels. - View Dependent Claims (30, 31, 32, 33, 34)
-
-
35. A code division multiple access (CDMA) subscriber unit comprising:
-
a despreading and demultiplexing device configured to recover a power control bit from a downlink control channel, wherein the power control bit has a value indicating a command to either increase or decrease transmission power level; and gain devices configured, in response to the received power control bit, to adjust a transmission power level of both a traffic channel and a reverse control channel prior to transmission by the subscriber unit, and the gain devices being configured to separately adjust the transmission power level of the traffic channel and the reverse control channel. - View Dependent Claims (36, 37, 38, 39, 40)
-
Specification
-
- Resources
Litigation Campaign Assessment
Thank you for your request. You will receive a custom alert email when the Litigation Campaign Assessment is available.
×
Litigation Data
-
Current AssigneeInterdigital Technology Corporation (InterDigital, Inc.)
-
Original AssigneeInterdigital Technology Corporation (InterDigital, Inc.)
-
InventorsOzluturk, Fatih, Kowalski, John, Lomp, Gary
-
Primary Examiner(s)Ha; Dac V
-
Application NumberUS10/084,007Publication NumberTime in Patent Office2,568 DaysField of Search375/130, 375/142, 375/144, 375/148, 375/150, 375/340, 375/343, 370/320, 370/331, 370/332, 370/335, 370/342, 370/441, 370/479, 455/13.4, 455/33.2, 455/38.3US Class Current375/140CPC Class CodesG06F 13/374 using a self-select method ...H03H 17/0226 comprising look-up tablesH03H 17/06 Non-recursive filtersH04B 1/707 using direct sequence modul...H04B 1/7075 with code phase acquisitionH04B 1/70753 Partial phase searchH04B 1/70754 Setting of search window, i...H04B 1/70755 Setting of lock conditions,...H04B 1/70758 Multimode search, i.e. usin...H04B 1/7077 Multi-step acquisition, e.g...H04B 1/708 Parallel implementationH04B 1/7085 using a code tracking loop,...H04B 1/709 Correlator structureH04B 1/7093 Matched filter typeH04B 1/711 the interference being mult...H04B 1/7115 Constructive combining of m...H04B 1/712 Weighting of fingers for co...H04B 2201/70701 featuring pilot assisted re...H04B 2201/70702 Intercell-related aspectsH04B 2201/70703 using multiple or variable ...View All
