Burst noise detection and pilot selection

摘要

Techniques are presented herein for detecting burst noise in a received orthogonal frequency division multiplex (OFDM) transmission. An OFDM transmission is received that includes pilots transmitted at different instances of time but on the same subcarrier during a predetermined time interval such that there are a plurality of different pairs of pilots that are on the same subcarriers during the predetermined time interval. For each possible pair of pilots, an equalized pilot is generated using received values for first and second pilots of the pair. A signal-to-noise ratio is computed for each equalized pilot. A determination is made as to which pilots, if any, are affected by burst noise by comparing the signal-to-noise ratio among the plurality of equalized pilots. Pilots determined to be affected by burst noise are removed from a channel response computation.

主权项

1. A method comprising:
receiving an orthogonal frequency division multiplex transmission including pilots transmitted at different instances of time but on the same subcarrier during a predetermined time interval such that there are a plurality of different pairs of pilots that are on the same subcarriers during the predetermined time interval; for each pair of pilots, generating an equalized pilot using received values for first and second pilots of the pair by dividing a received value for the second pilot by a received value for the first pilot; computing a signal-to-noise ratio for each equalized pilot; determining which pilots, if any, are affected by burst noise by comparing the signal-to- noise ratio among the plurality of equalized pilots; and removing from a channel response computation any pilots determined to be affected by burst noise.