quasi-perfect code

Performances Analysis of Quasi synchronous Code Division Multiple Access System Using Arbitrary Chip Waveform

使用任意chip波形时准同步码分多址系统的性能分析

The reason is that the multi-access quasi-synchronization scheme assures the time delay among transmitters to be limited in no hit zone of NHZ code.

由于多址接入准同步方案保证了跳频通信系统发信机间的时延在跳频码的无碰撞区范围内，充分利用了无碰撞区跳频码的特点，因而使得系统的整体误码率性能得到了改善。

ABBA-code is a quasi-orthogonal space-time block code for 3 + Tx antennas.

ABBA码是一种可用于三个以上发送天线系统的准正交 空时分组编码.

Then the different channel models for multiplex antenna systems are given. And the system capacities for single user and multiuser multi-antenna systems are analyzed. A new improved quasi-orthogonal inserted Walsh codes method is proposed, which makes the code number for spreading spectrum system greatly increased.

介绍了多天线信道不同建模方法，给出了单用户和多用户的多天线系统容量。