Data receiver for receiving code signals having a variable data

Details Data receiver for receiving code signals having a variable data Data receiver for receiving code signals having a variable data

1995-12-27

1997-11-18

Kizou, Hassan

Multiplex communications

Communication techniques for information carried in plural...

Combining or distributing information via time channels

375225, 375341, H04B 116, H04J 322

Patent

active

056895119

ABSTRACT:
A data receiver receives code data having a variable data rate and encoded with any one of a plurality of data rates and then repeated in accordance with the respective data rates to be provided with the same data rate thereby, and restores, frame by frame, the received code data to data having original data rates. The receiver has a data rate detecting circuit which sequentially receives one frame of code data having the same data rate at a time, and detects the data rate of the code data assigned before the repetition. A data rate restoring circuit restores, based on the detected data rate, the frame of code data to the data having the original data rate. A data reproducing circuit reproduces the original signal out of the code data restored by the data rate restoring circuit. The data rate detecting circuit has a calculating circuit for calculating the autocorrelation functions of the frame of code data to thereby determine how many times the code data have been repeated, and a decision circuit for determining the data rate of the frame of code data assigned before the repetition on the basis of the characteristic of the data rate in the autocorrelation functions. The data rate restoring circuit and data reproducing circuit perform the respective processings on the basis of the determined data rate.

REFERENCES:
patent: 3775751 (1973-11-01), Anderson
patent: 3842399 (1974-10-01), Kneuer et al.
patent: 5008902 (1991-04-01), Key et al.
patent: 5509020 (1996-04-01), Iwakiri et al.
patent: 5563910 (1996-10-01), Mellone et al.
patent: 5606742 (1997-02-01), Kido
TR45 Mobile Station-Base Station Compatibility Standard for Dual-Mode Wideband Spread Sprectrum Cellular System PN-3421 (to be published as IS-95-A)Ballot Version.

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