Parallel spread spectrum communication system and method

A technology of data communication and bit expansion, which is applied in transmission system, multiplex communication, orthogonal multiplex system, etc., can solve the problem that conventional systems cannot provide enhanced processing gain practically and effectively, and cannot support large PN sequence length, PN correlator is difficult to detect, etc., to achieve low power requirements, increase communication distance, and reduce the effect of acquisition cycle
CN1846357AInactive Publication Date: 2006-10-11开普兰奇无线电马来西亚有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
开普兰奇无线电马来西亚有限公司
Publication Date
2006-10-11
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention involves a parallel spread spectrum ('PSS') technique of spreading orthogonal encoded data. In a preferred embodiment, a method and system for communicating data comprises encoding and spreading a data stream using a scheme employing orthogonal Walsh functions, and thereby segmenting the data stream into multiple bit data packets representing one of a number of true or inverted Walsh codes. The data stream is then differentially encoded for either BPSK or QPSK modulation, and spread using a PN-sequence. The parallel spread data stream is modulated for transmission to a receiver. At the receiver, the data stream is recovered by computing a cross correlation between the digitized data stream and a programmed sequence. One of the benefits of the PSS techniques over conventional communication systems is that additional processing gain plus data forward error correction can be simultaneously achieved.
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Description

technical field

[0001] The present invention relates to digital communications, and more particularly to systems and methods for providing spread spectrum related communications. Background technique

[0002] Spread spectrum communication technology has a wide range of applications. For example, spread spectrum has its origins in military communications that are sensitive to interception / eavesdropping and vulnerable to tampering / jamming. However, a host of commercial applications for spread spectrum have been developed, especially in the field of wireless communications, eg cellular mobile communications.

[0003] The basic concept of spread spectrum is contrary to long-standing communication practice. In particular, conventional practice focuses on minimizing the frequency bandwidth of information-bearing signals in order to fit more signals into the communication link (channel). On the contrary, the goal of spread spectrum is to substantially increase the bandwidth of t...

Claims

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