Apparatus and methods for puncturing and recovering code in spre

Details Apparatus and methods for puncturing and recovering code in spre Apparatus and methods for puncturing and recovering code in spre

1998-07-30

2000-12-12

Le, Amanda T.

Pulse or digital communications

Spread spectrum

Direct sequence

375146, 375147, 375342, 714790, H03M 1303, H04B 1707

Patent

active

061608408

ABSTRACT:
Apparatus and methods for puncturing and recovering a code in a spread spectrum communication system are provided. Repeated symbols are punctured in predetermined locations and different data is inserted in the punctured locations, in a transmitter. Then, in a receiver, the punctured symbols are recovered by separating the inserted data from input data and filling previous unpunctured symbols in the punctured locations. In another embodiment, the transmitter simply punctures repeated symbols in predetermined locations to obtain an intended symbol rate. Then, the receiver recovers the punctured symbols by filling previous unpunctured symbols in the punctured locations. Therefore, errors at channel decoding are reduced.

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