Patent ID: 7778364

Claim:
A signal strength estimation system for a code division multiple access system, comprising: a channel compensator, for compensating channel effect upon a received signal and outputting first and second compensated signals, wherein the received signal comprises a first signal and a second signal, and wherein the second signal is obtained by space time transmit diversity (STTD) encoding the first signal; a demodulator, coupled to the channel compensator, for demodulating the first and second compensated signals by corresponding 4-bit pilot patterns when each of the first and second compensated signals having 2 pilot bits and outputting first and second demodulated signals; an extractor, coupled to the demodulator, for respectively extracting first and second pilot signals from the first and second demodulated signals; and an average circuit, coupled to the extractor, for averaging the first and second pilot signals, thereby obtaining a signal strength estimation.