Pulse or digital communications – Repeaters – Testing
Patent
1994-02-25
1996-05-07
Gregory, Bernarr E.
Pulse or digital communications
Repeaters
Testing
375200, 375205, 380 34, 370 19, 370 21, 370 22, H04B 1707, H04B 169
Patent
active
055153968
ABSTRACT:
A communication system utilizes multiple spreading codes to transmit high data rate information. The system codes high data rate user information (201) and partitions the coded information (202) into blocks comprised of two bits, B1 and B2. Based on the representation of bits B1 and B2, the system chooses one of a possible four spreading codes (W.sub.1 and W.sub.2 and their phase reversals W.sub.1 ' and W.sub.2 ') to be utilized for transmission. Once received, the transmitted signal is input into correlators (306, 309) specific to each spreading code W1 and W2, and the maximum absolute value output from the correlators (306, 309) is determined. From this determination, the transmitted spreading code W.sub.1, W.sub.2, W.sub.1 ' or W.sub.2 ' is determined. The use of multiple spreading codes allows the for the transmission of high data rate information without altering the wireless air interface of the communication system.
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Gregory Bernarr E.
Motorola Inc.
Sonnentag Richard A.
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