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Generating a composite signal with code division multiplexing (CDM) and time division multiplexing (TDM) pilots

  • US 10,523,265 B2
  • Filed: 02/16/2018
  • Issued: 12/31/2019
  • Est. Priority Date: 11/27/2008
  • Status: Active Grant
First Claim
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1. A wireless communication unit comprising:

  • a receiver configured to receive a composite signal, wherein the composite signal includes data symbols, a code division multiplexing (CDM) pilot sequence that is spread with a first channelization code, and a time division multiplexing (TDM) pilot sequence including a cyclic prefix, wherein the TDM pilot sequence is spread with a second channelization code; and

    wherein the composite signal is received within a pre-defined portion of a time slot such that the CDM pilot sequence has non-cyclic properties;

    wherein the TDM pilot sequence is composed such that the composite signal has a cyclic prefix time domain structure within the pre-defined portion of the time slot;

    wherein the cyclic prefix includes a replicated portion of a base portion of the composite signal;

    a processor, communicatively coupled to the receiver, configured to descramble the composite signal with a non-cyclic scrambling code, and to demodulate the composite signal to recover the data symbols based on the TDM pilot sequence or the CDM pilot sequence.

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