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AR# 38686

LogiCORE LTE RACH Detector v1.0 - What is the correct description for the Fc offset demodulation value described in data sheet DS761?

Description

For the LogiCORE LTE RACH Detector v1.0,what is the correct description for the Fc offset demodulation value described in data sheet DS761?

解决方案

In the documentation, the value Fc, which controls the frequency offset demodulation, is incorrectly described.

There are two mistakes:

1.There should be an adjustment determined by the bandwidth/sample rate. As the sample rate goes down, the phase increment per sample needs to increase to maintain the same Fc.For example,Fc for abandwidth of 20 is doubled if thebandwidth is dropped to 10.

2. The frequency value calculated is half of the value it should be. This stems from the fact that Fc is actually a phase increment, so to get a frequency of 1, the phase increment would be 0.5 per sample.

For the LogiCORE IP LTE RACH Detector - Release Notes and Known Issues from other versions, see (Xilinx Answer 35106).

链接问答记录

主要问答记录

Answer Number 问答标题 问题版本 已解决问题的版本
35106 LogiCORE IP LTE RACH 检测器 - 版本说明和已知问题 N/A N/A
AR# 38686
创建日期 10/20/2010
Last Updated 01/05/2012
状态 Active
Type 已知问题
IP
  • LTE RACH Detector