Super-complementary-code generating method, system and communication system using the super-complementary-code

Abstract

This invention discloses a super complementary code producing method, the system and the communication system using the super complementary code. At first produce N complete complementary codes, and every complementary code has N basic codes, and every basic code has N to the power 2 elements, interacting compute the basic codes to get several complementary codes, every super complementary code has several sub-code, and every sub-code has at least one element. The system producing super complementary is mainly composed of orthogonal matrix assembly, the sequence producer, the complete complementary code producer and the super complementary producer. The super complementary code produced by this invention has the characteristics of 'non-connection interference' and 'non-multi-way interference'. In addition, because the length of the sub-code of the super complementary code can be lowered to 1, so it can lower the ratio of the gain value and the number of users to 1 at least, and the super complementary code of this invention can increase the number of supporting communication users.

Description

technical field [0001] The present invention relates to a method and system for generating complementary codes, and a code division multiple access communication system, in particular, to a method and system for generating super complementary codes, and a code division multiple access communication system using super complementary codes. Background technique [0002] While the third-generation wireless communication system is about to enter global deployment, the implementation architecture of the fourth-generation system has become one of the most common research topics in the communication field. However, the performance of the air-interface technology currently used in the third generation system should be further improved to meet the needs of the fourth generation system. In a mobile communication system, 'uplink' refers to the transmission from the mobile terminal to the base station, and 'downlink' refers to the transmission from the base station to the mobile phone. ...

AI Technical Summary

Problems solved by technology

Third, due to the asynchronous data transmitted from each mobile terminal to the base station in the uplink in the same cell, part of the aperiodic cross-correlation function between the user identification codes, rather than the periodic correlation function, determines the uplink wireless transmission performance; unfortunately, the former is usually more difficult to control than the latter, and also leads to more severe multiple access interference problems than in the downlink

Both of the above two patents generate codes with a zero correlation window, and the multiple access interference and multipath interference outside the zero correlation window cannot be eliminated

The length of its zero-correlation window is limited, because a larger zero-correlation window means a larger guard interval (system overhead), and reduces the number of generated codes (the number of users that can be supported)

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