time invariant channel

Since conventional channel model be considered as a linear time invariant channel, although, some research works continues to deeper research, and model linear time-varying channel.

由于传统信道模型被认为是一个线性的非时变的信道，虽然，后来一些科研工作者又进行了深入的研究，把信道模型扩展到线性时变模型。

In chapter four and five, the author generalizes this method to MIMO case for time-invariant and time-variant MIMO channel estimation respectively.

在本文的四、五两章中，作者将这种思想推广到MIMO情形，对FIR时变/时不变信道分别进行估计。

The major works of this paper can be summarized as follows: ( 1) On the basis of time-invariant modeling for OFDM, an improved algorithm based on Superimposed Pilot that suit to time-invariant channel estimation has been proposed.

其主要工作概括如下：（1）在时不变环境条件下OFDM系统的模型的基础上，提出了一种基于叠加导频的时慢变信道估计算法。

According to different channel models, CDMA systems can be divided into additive white gaussian noise ( AWGN) channel and dispersive channel, time-variant and time-invariant channel.

CDMA系统按信道模型的不同分为高斯白噪声信道和衰落信道、时变和时不变信道。

The ideal channel impulse response can be obtained by using projections onto convex sets algorithm to estimate time invariant channel.

使用凸集投影算法估计时不变信道时，可以获得理想的信道冲激响应估计结果。