Method for controlling a diversity receiver apparatus in a radio subscriber unit
First Claim
1. A method for operating a radio subscriber unit having a diversity receiver apparatus including at least a first antenna and a second antenna, wherein the first antenna is at least partially uncorrelated with respect to the second antenna, the method comprising the steps of:
- receiving a first representation and a second representation of a composite radio frequency (RF) signal from the first antenna and the second antenna, respectively, wherein the composite signal includes a desired direct sequence-code division multiple access (DS-CDMA) RF signal and interfering signals, and wherein the desired DS-CDMA RF signal includes at least one coded pilot signal;
determining at least one ratio of the at least one coded pilot signal to an estimate of the composite RF signal responsive to receiving at least one of the first representation of the composite RF signal and the second representation of the composite RF signal; and
controlling a selected state of the first antenna and the second antenna responsive to the at least one ratio.
5 Assignments
0 Petitions
Accused Products
Abstract
A radio subscriber unit (102) has a diversity receiver apparatus (106) including a first antenna (114) and a second antenna (116). A first representation (158) and a second representation (160) of a composite radio frequency (RF) signal are received from the first antenna (114) and the second antenna (116), respectively. The composite radio frequency (RF) signal includes a desired RF signal (156) and interfering signals (166). The desired RF signal (156) includes at least one coded pilot signal (Ec). A ratio (Ec/Io) (142) of the at least one coded pilot signal (Ec) to an estimate of the composite RF signal (Io) is determined responsive to receiving at least one of the first representation of the composite RF signal (158) and the second representation of the composite RF signal (160). A selected state of the first antenna(114) and the second antenna (116) is controlled responsive to at least one of the ratio (Ec/Io) (142) and an integrated received signal strength indication (∫RSSI) of the composite RF signal.
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Citations
20 Claims
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1. A method for operating a radio subscriber unit having a diversity receiver apparatus including at least a first antenna and a second antenna, wherein the first antenna is at least partially uncorrelated with respect to the second antenna, the method comprising the steps of:
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receiving a first representation and a second representation of a composite radio frequency (RF) signal from the first antenna and the second antenna, respectively, wherein the composite signal includes a desired direct sequence-code division multiple access (DS-CDMA) RF signal and interfering signals, and wherein the desired DS-CDMA RF signal includes at least one coded pilot signal; determining at least one ratio of the at least one coded pilot signal to an estimate of the composite RF signal responsive to receiving at least one of the first representation of the composite RF signal and the second representation of the composite RF signal; and controlling a selected state of the first antenna and the second antenna responsive to the at least one ratio. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for operating a radio subscriber unit having a diversity receiver apparatus including at least a first antenna and a second antenna, wherein the first antenna is at least partially uncorrelated with respect to the second antenna, the method comprising the steps of:
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receiving a first representation and a second representation of a composite radio frequency (RF) signal from the first antenna and the second antenna, respectively, wherein the composite signal includes a desired direct sequence-code division multiple access (DS-CDMA) RF signal and interfering signals, and wherein the desired DS-CDMA RF signal includes at least one coded pilot signal and at least one data signal, wherein the at least one data signal includes a plurality of sequential symbols representing data, and wherein each of the plurality of sequential symbols is divided into a plurality of time periods called chips; measuring at least one received signal strength indication (RSSI) of the composite RF signal responsive to receiving at least one of the first representation of the composite RF signal and the second representation of the composite RF signal; integrating the at least one RSSI of the composite RF signal over a plurality of the chips to produce at least one integrated RSSI of the composite RF signal; and controlling a selected state of the first antenna and the second antenna responsive to the at least one integrated RSSI of the composite RF signal. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A method for operating a radio subscriber unit having a diversity receiver apparatus including at least a first antenna and a second antenna, wherein the first antenna is at least partially uncorrelated with respect to the second antenna, the method comprising the steps of:
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receiving a first representation and a second representation of a composite radio frequency (RF) signal from the first antenna and the second antenna, respectively, wherein the composite signal includes a desired direct sequence-code division multiple access (DS-CDMA) RF signal and interfering signals, and wherein the desired DS-CDMA RF signal includes at least one coded pilot signal and at least one data signal, wherein the at least one data signal includes a plurality of sequential symbols representing data, and wherein each of the plurality of sequential symbols is divided into a plurality of time periods called chips; determining whether or not the desired DS-CDMA RF signal substantially dominates the composite RF signal; when it is determined that the desired DS-CDMA RF signal does not substantially dominate the composite RF signal perform the steps of; determining at least one ratio of the at least one coded pilot signal to an estimate of the composite RF signal responsive to receiving at least one of the first representation of the composite RF signal and the second representation of the composite RF signal; and controlling a selected state of the first antenna and the second antenna responsive to the at least one ratio; and when it is determined that the desired DS-CDMA RF signal does substantially dominate the composite RF signal perform the steps of; determining at least one ratio of the at least one coded pilot signal to an estimate of the composite RF signal responsive to receiving at least one of the first representation of the composite RF signal and the second representation of the composite RF signal; measuring at least one received signal strength indication (RSSI) of the composite RF signal responsive to receiving at least one of the first representation of the composite RF signal and the second representation of the composite RF signal; integrating the at least one RSSI of the composite RF signal over a plurality of the chips to produce at least one integrated RSSI of the composite RF signal; and controlling a selected state of the first antenna and the second antenna responsive to at least one of the at least one ratio and the at least one integrated RSSI of the composite RF signal.
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Specification