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Scattered pilot pattern and channel estimation method for MIMO-OFDM systems

  • US 8,971,169 B2
  • Filed: 04/09/2014
  • Issued: 03/03/2015
  • Est. Priority Date: 10/17/2001
  • Status: Expired due to Fees
First Claim
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1. A method of inserting pilot symbols into Orthogonal Frequency Division Multiplexing, OFDM, frames at an OFDM transmitter having at least two transmitting antennas, the OFDM frames having a time domain and a frequency domain, each OFDM frame comprising a plurality of OFDM symbols in the time domain and a plurality of sub-carriers in the frequency domain, the method comprising the steps of:

  • for a first antenna of the OFDM transmitter, inserting scattered pilot symbols in a scattered pattern in time-frequency by inserting a first set of pilot symbols in a first pattern in time-frequency and inserting a second set of pilot symbols in a second pattern in time-frequency at the same frequencies as the first pattern, offset by one OFDM symbol in the time domain; and

    for a second antenna of the OFDM transmitter, inserting scattered pilot symbols using the same scattered pattern.

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