High processing gain spread spectrum TDMA system and method

Details High processing gain spread spectrum TDMA system and method High processing gain spread spectrum TDMA system and method

1998-01-12

2000-12-12

Hsu, Alpus H.

Multiplex communications

Communication over free space

Combining or distributing information via code word channels...

370347, 370535, 375143, H04B 7216, H04B 7212, H04J 304

Patent

active

061608033

ABSTRACT:
A system and method for encoding and transmitting data with a spread-spectrum time-division-multiple-access (SS-TDMA) system. Data to be transmitted by a SS-TDMA transmitter are sent within a particular specified group of time slots. Random packets also can be sent by transmission during an open time slot. The TDMA data are demultiplexed into sub-data-sequence signals, each of which are spread-spectrum processed and then combined as a multichannel, BPSK, QPSK or QAM spread-spectrum signal. The multichannel spread-spectrum signal is concatenated with a header to output a packet-spread-spectrum signal which is transmitted over radio waves to a packet receiver. The packet receiver obtains timing for the multichannel spread-spectrum signal from the header. The multichannel spread-spectrum signal is then despread and multiplexed as received-TDMA data. The received-TDMA data are selected from a particular time slot by the intended recipient and stored in a receiver memory for output.

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patent: 5410568 (1995-04-01), Schilling
patent: 5504776 (1996-04-01), Yamaura et al.
patent: 5862133 (1999-01-01), Schilling

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