Generating a composite signal with code division multiplexing (CDM) and time division multiplexing (TDM) pilots
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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Abstract
A wireless communication may receive a composite signal that 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 where the TDM pilot sequence is spread with a second channelization code. The composite signal may be received within a designated time region such that the CDM pilot sequence has non-cyclic properties over the designated time region. The composite signal may be descrambled with a non-cyclic scrambling code.
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Citations
16 Claims
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1. A wireless communication unit comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method performed by a wireless communication unit, the method comprising:
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receiving, by the wireless communication unit, 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; 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; descrambling, by the wireless communication unit, the composite signal with a non-cyclic scrambling code; and demodulating, by the wireless communication unit, the composite signal to recover the data symbols based on the TDM pilot sequence or the CDM pilot sequence. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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Specification