Pulse or digital communications – Bandwidth reduction or expansion – Pulse code modulation
Reexamination Certificate
2011-08-23
2011-08-23
Liu, Shuwang (Department: 2611)
Pulse or digital communications
Bandwidth reduction or expansion
Pulse code modulation
C375S150000, C375S240000, C375S256000, C375S260000, C375S341000, C375S340000
Reexamination Certificate
active
08005152
ABSTRACT:
A signal compression method and apparatus for a base transceiver system (BTS) in a wireless communication network provides efficient transfer of compressed signal samples over serial data links in the system. For the uplink, an RF unit of the BTS compresses baseband signal samples resulting from analog to digital conversion of a received analog signal followed by digital downconversion. The compressed signal samples are transferred over the serial data link to the baseband processor then decompressed prior to normal signal processing. For the downlink, the baseband processor compresses baseband signal samples and transfers the compressed signal samples to the RF unit. The RF unit decompresses the compressed samples prior to digital upconversion and digital to analog conversion to form an analog signal for transmission over an antenna. Compression and decompression can be incorporated into operations of conventional base stations and distributed antenna systems, including OBSAI or CPRI compliant systems.
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Haynes Beffel & Wolfeld LLP
Koenig Carolyn
Liu Shuwang
Patel Dhaval
Samplify Systems, Inc.
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