Asynchronous transfer mode type multimedia radiocommunication sy

Details Asynchronous transfer mode type multimedia radiocommunication sy Asynchronous transfer mode type multimedia radiocommunication sy

1996-06-14

1998-03-17

Chin, Wellington

Multiplex communications

Generalized orthogonal or special mathematical techniques

Quadrature carriers

370342, 370347, 370395, 370538, 375265, H04J 302

Patent

active

057295263

ABSTRACT:
An asynchronous transfer mode type multimedia radiocommunication system including a transmitter and a receiver connected to the transmitter via an asynchronous transfer mode network and wherein accesses to two channel data which communicate by radio and have different levels of communication quality, are performed by the asynchronous transfer mode network. A separator of a transmitter separates input data into L-bit main channel data and one-bit sub channel data. A convolutional coder convolutionally codes the data. Further, a mapper maps the resultant binary information onto crossed I and Q channel axes according to the data by switching for each L bit of the main channel data, thereby enabling transmission of additive information corresponding to data of 1/L the transfer rate. Thereafter, a viterbi decoder of a receiver decodes the information. Further, a sub channel having arbitrary communication quality can be provided by arbitrarily selecting the value (L.sub.min .ltoreq.L) of an L bit.

REFERENCES:
patent: 4941154 (1990-07-01), Wei
patent: 5396518 (1995-03-01), How
patent: 5418798 (1995-05-01), Wei
patent: 5537430 (1996-07-01), Park et al.
patent: 5565926 (1996-10-01), Bryan et al.
patent: 5583889 (1996-12-01), Citta et al.

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