Spread spectrum orthogonal frequency division multiplexing mixing system

Abstract

The invention provides a spread spectrum-OFDM mixed system, comprising: OFDM and spread spectrum mixed transmitter comprising spread spectrum communication channel unit and OFDM communication channel unit, processing signaling signal through the former and communication data through the latter, respectively, and sending out the processed signaling signal and communication data; OFDM and spread spectrum mixed receiver comprising spread spectrum communication channel unit and OFDM communication channel unit, obtaining the signaling signal from the received signal by processing of the former and the communication data by processing of the latter, respectively. And the invention can make signaling signal and communication data concurrently transmitted, avoiding the signaling signal singly occupying the rare wireless communication resources of the base station system.

Description

technical field [0001] The invention relates to the communication field, in particular to a spread spectrum OFDM (orthogonal frequency division multiplexing) hybrid system. Background technique [0002] Spread spectrum communication (SS: Spread Spectrum) refers to a technology that widens the frequency band of the original information so that it can be transmitted in a wider frequency band, and restores the original information bandwidth at the receiving end through related receiving techniques. The methods of spread spectrum communication mainly include: Direct Sequence Spread Spectrum (DS: Direct Sequence Spread Spectrum, DS for short), Frequency Hopping Spread Spectrum (FH: Frequency Hopping), Time Hopping (TH: Time Hopping), and Chirp. [0003] The above-mentioned direct sequence spread spectrum is to directly spread the frequency spectrum of the original information signal at the transmitting end with a high-rate pseudo-random spreading code PN sequence, and despread th...

AI Technical Summary

Problems solved by technology

[0012] 1. The above-mentioned "time slice dedicated to coexistence negotiation" must be unified across the entire network, across networks, and across regions. This mandatory requirement must usually be implemented by government departments in the form of policies, which is relatively difficult;

[0013] 2. In the frame format of the original base station system, the "coexistence negotiation dedicated time slice" is divided, which occupies the scarce wireless communication resources of the base station system to a certain extent. In this time slice, the base station system cannot perform normal business communication. The problem is particularly prominent when the flow rate is large

Images