Spread code generation device for spread spectrum communication

Details Spread code generation device for spread spectrum communication Spread code generation device for spread spectrum communication

1995-04-21

1997-05-20

Chin, Stephen

Pulse or digital communications

Repeaters

Testing

375206, 370342, H04B 1500, H04K 100, H04L 2730

Patent

active

056319223

ABSTRACT:
There is disclosed a spread code generation device for spread spectrum communication wherein an input data is modulated so as to be spread by a spread code having a first period. The device includes a long period PN code generator for generating a spread code having a second period longer than the first period, an initial state register for storing an initial phase of the spread code having the first period output from the long period PN code generator and for outputting the initial phase to the long period PN code generator, and a counter for receiving and computing the spread code output from the long period PN code generator and for outputting a trigger signal to the initial state register when the computed spread code reaches the first period. The initial state register outputs the initial phase to the long period PN code generation in response to the trigger signal from the counter. The long period PN code generator is reset to the initial phase when the initial phase is input to the long period PN code generator, whereby the spread code having the first period is output from the counter.

REFERENCES:
patent: Re35209 (1996-04-01), Partyka et al.
patent: 5438596 (1995-08-01), Sugita
patent: 5488662 (1996-01-01), Fox et al.
TIA/EIA Interim Standard, "Mobile Station-Base Station Compatibility Standard for Dual-Mode Wideband Spread Spectrum Cellular System", Telecommunications Indsutry Assoc., TIA/EIA/IS-95, Jul. 1993.

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