H - Electricity – 04 – B
Patent
H - Electricity
04
B
H04B 1/69 (2006.01) H04B 1/707 (2006.01)
Patent
CA 2334613
A synchronization establishing apparatus in a spectrum spread communication system includes a search section (100, 200, 7, 10), a frequency offset estimating section (11) and a demodulation path selecting section (12). The search section (100, 200, 7, 10) calculates correlation values from a received spectrum spread signal, and calculates power values as addition values of symbols corresponding to the correlation values and power addition values of the power values. Also, the search section selects larger ones of the power addition values to output together with timing data corresponding to the selected larger power addition values. At this time, one of the symbols and the power values being corrected in phase based on frequency offsets. The frequency offset estimating section (11) estimates the frequency offsets from one of the correlation values and the power values and demodulation timing data to output to the search section. The demodulation path selecting section (12) selects path timings from the timing data used on the selected larger power addition values and outputs the demodulation timing data indicative of the bath timings to the frequency offset estimating section.
Corporation Nec
Smart & Biggar
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