5G NR PDSCH DMRS 解扰matlab模拟全流程代码
时间: 2023-08-11 10:07:44 浏览: 124
以下是5G NR PDSCH DMRS解扰Matlab模拟全流程代码:
首先,定义常量参数:
```matlab
% Define constant parameters
N_SC_RB = 12; % Number of subcarriers in each resource block
N_RB = 50; % Number of resource blocks in the system bandwidth
N_SC = N_RB*N_SC_RB; % Total number of subcarriers
N_CellID = 10; % Physical layer cell identity
N_ID_DMRS = 0; % DMRS scrambling identity
N_ID_Cell = 0; % Cell-specific reference signal scrambling identity
N_Ports = 1; % Number of transmission ports
```
接下来,生成随机的QPSK调制符号:
```matlab
% Generate random QPSK symbols
txBits = randi([0 1], N_SC*N_Ports, 1);
txBitsMod = qpskmod(txBits);
```
然后,生成DMRS序列:
```matlab
% Generate DMRS sequence
dmrsSym = lteDMRS(N_ID_Cell, N_ID_DMRS, N_CellID, N_Ports, N_SC);
dmrsSymMod = qpskmod(dmrsSym);
```
对QPSK符号进行DMRS解扰:
```matlab
% DMRS demodulation
dmrsSymDemod = qpskdemod(dmrsSymMod);
dmrsSymDemodDescrambled = lteDMRSDeScramble(dmrsSymDemod, N_ID_Cell, N_CellID);
```
对QPSK符号进行PDSCH解扰:
```matlab
% PDSCH demodulation
rxBitsDescrambled = ltePDSCHDecode(txBitsMod, dmrsSymDemodDescrambled, N_CellID, N_Ports, N_RB, N_ID_Cell);
```
最后,计算误码率:
```matlab
% Calculate bit error rate
[numErrors, ber] = biterr(txBits, rxBitsDescrambled);
fprintf('Bit error rate = %d\n', ber);
```
以上就是5G NR PDSCH DMRS解扰Matlab模拟全流程代码。
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