Multiplex communications – Communication techniques for information carried in plural... – Combining or distributing information via time channels
Reexamination Certificate
2003-08-11
2010-06-01
Eng, George (Department: 2617)
Multiplex communications
Communication techniques for information carried in plural...
Combining or distributing information via time channels
C714S748000
Reexamination Certificate
active
07729390
ABSTRACT:
A transmit signal is spread by a plurality of spreading sections103, 104, 105, and106, using different spreading codes. A selection section107increases the number of spread signals to be output as the number of retransmissions increases. By this means, a retransmission signal spread by means of many spreading codes is code division multiplexed. As a result, retransmission signal error rate characteristics are improved on the receiving side by despreading this code division multiplexed signal using the same plurality of spreading codes as on the transmitting side, and selecting or combining the despreading results with the greatest correlation power thereamong. Also, since the degree of code multiplexing is increased proportionally as the number of retransmissions increases, retransmission signal error rate characteristics can be improved without lowering spectral efficiency unnecessarily.
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Brandt Christopher M
Dickinson Wright PLLC
Eng George
Panasonic Corporation
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