Multiple antenna servicing by multibranch PSYNC detection module
First Claim
1. A method for operating a wireless terminal operable to receive a diversity Wideband Code Division Multiple Access (WCDMA) signal from a base station, the method comprising:
- generating a wireless terminal clock using a wireless terminal oscillator;
receiving the diversity WCDMA signal via two receive paths, the diversity WCDMA signal produced by the base station using a base station clock that is produced using a base station oscillator that is more accurate than the wireless terminal oscillator;
multiplexing the diversity WCDMA signal of the two receive paths to a plurality of Primary Synchronization (PSYNC) correlation branches of a PSYNC module so that a first one of the receive paths couples to the plurality of PSYNC correlation branches during first time intervals and a second one of the receive paths couples to the plurality of PSYNC correlation branches during second time intervals; and
for each of the plurality of PSYNC correlation branches and for each of the first time intervals and the second time intervals;
phase rotating the diversity WCDMA signal based upon a respective frequency offset;
correlating the phase rotated diversity WCDMA signal with a Primary Synchronization Channel (P-SCH) code over a plurality of positions; and
producing PSYNC correlation energies based upon the correlations for each of the plurality of positions.
6 Assignments
0 Petitions
Accused Products
Abstract
A wireless terminal is operable to receive a Wideband Code Division Multiple Access (WCDMA) signal from a base station and includes clock circuitry, a wireless interface, and a Primary Synchronization (PSYNC) module. The clock circuitry generates a wireless terminal clock using a wireless terminal oscillator. The wireless interface receives the WCDMA signal, which is produced by the base station using a base station clock that is produced using a base station oscillator that is more accurate than the wireless terminal oscillator. The PSYNC module includes a plurality of PSYNC correlation branches. Each PSYNC correlation branch phase rotates the WCDMA signal based upon a respective frequency offset, correlates the phase rotated WCDMA signal with a Primary Synchronization Channel (PSCH) code over a plurality of sampling positions, and produces PSYNC correlation energies based upon the correlations for each of the plurality of sampling positions.
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Citations
20 Claims
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1. A method for operating a wireless terminal operable to receive a diversity Wideband Code Division Multiple Access (WCDMA) signal from a base station, the method comprising:
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generating a wireless terminal clock using a wireless terminal oscillator; receiving the diversity WCDMA signal via two receive paths, the diversity WCDMA signal produced by the base station using a base station clock that is produced using a base station oscillator that is more accurate than the wireless terminal oscillator; multiplexing the diversity WCDMA signal of the two receive paths to a plurality of Primary Synchronization (PSYNC) correlation branches of a PSYNC module so that a first one of the receive paths couples to the plurality of PSYNC correlation branches during first time intervals and a second one of the receive paths couples to the plurality of PSYNC correlation branches during second time intervals; and for each of the plurality of PSYNC correlation branches and for each of the first time intervals and the second time intervals; phase rotating the diversity WCDMA signal based upon a respective frequency offset; correlating the phase rotated diversity WCDMA signal with a Primary Synchronization Channel (P-SCH) code over a plurality of positions; and producing PSYNC correlation energies based upon the correlations for each of the plurality of positions. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A wireless terminal operable to receive a diversity Wideband Code Division Multiple Access (WCDMA) signal from a base station, the wireless terminal comprising:
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clock circuitry operable to generate a wireless terminal clock using a wireless terminal oscillator; a wireless interface including two receive paths operable to receive the diversity WCDMA signal, the diversity WCDMA signal produced by the base station using a base station clock that is produced using a base station oscillator that is more accurate than the wireless terminal oscillator; and a Primary Synchronization (PSYNC) module coupled to the wireless interface and to the clock circuitry, the PSYNC module comprising; multiplexing circuitry having two inputs coupled to the two receive paths of the wireless interface; a plurality of PSYNC correlation branches, each PSYNC correlation branch coupled to an output of the multiplexing circuitry and operable to; phase rotate the diversity WCDMA signal based upon a respective frequency offset; correlate the phase rotated diversity WCDMA signal with a Primary Synchronization Channel (P-SCH) code over a plurality of sampling positions; and produce PSYNC correlation energies based upon the correlations for each of the plurality of sampling positions; and the multiplexing circuitry operable to couple a first one of the receive paths to the plurality of PSYNC correlation branches during first time intervals and operable to couple a second one of the receive paths to the plurality of PSYNC correlation branches during second time intervals. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification