Radio communication apparatus and radio communication method

Details Radio communication apparatus and radio communication method Radio communication apparatus and radio communication method

2006-05-02

2006-05-02

Luther, William A. (Department: 2667)

Multiplex communications

Generalized orthogonal or special mathematical techniques

Particular set of orthogonal functions

C370S337000, C370S491000, C375S134000

Reexamination Certificate

active

07039003

ABSTRACT:
Symbol102that is spread with the only short spreading code and inserted in synchronism with a long spreading code is specified by detecting the correlation with only the short spreading code. Next, another short spreading code indicative of a timing of reverse and forward link switching is specified, where the short spreading code is multiplexed at the same position as that of the detected symbol. The detection of the symbols spread with only these spreading codes enables to acquire synchronization of the long spreading code, synchronization of switching of reverse and forward links, and synchronization of a transmission frame. It is thereby possible to reduce synchronization acquisition time for the long spreading and an easy planning of base station locations without decreasing the frequency utilization efficiency.

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English Language Abstract of JP 9-271071
English Language Abstract JP 9-8770.
An article by K. Higuchi et al., published by Technical Report of IEICE. DSP96-111, RCS96-122 (Jan. 1997) at pp. 57-63, entitled “Fast Cell Search Algorithm Using Long Code Masking In DS-CDMA Asynchronous Cellular System”, along with an English language Abstract.

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