GENERATING A COMPOSITE SIGNAL WITH CODE DIVISION MULTIPLEXING (CDM) AND TIME DIVISION MULTIPLEXING (TDM) PILOTS
First Claim
Patent Images
1. A wireless communication unit comprising:
- a receiver configured to receive a composite signal, wherein the composite signal includes data, a code-division multiplexing (CDM) pilot sequence 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 has a pre-defined portion of a time slot where the CDM pilot sequence is non-cyclic;
wherein the TDM pilot sequence is composed such that the composite signal has a cyclic structure within the pre-defined portion of the time slot;
wherein the cyclic prefix includes a portion of the composite signal; and
a processor, communicatively coupled to the receiver, configured to descramble the composite signal with a non-cyclic scrambling sequence, and configured to demodulate the composite signal to recover the data based on the TDM pilot sequence or the CDM pilot sequence.
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Abstract
A wireless communication unit may receive a composite signal that includes data, 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. The TDM pilot sequence may be spread with a second channelization code. The composite signal may have a pre-defined portion of a time slot where the CDM pilot sequence is non-cyclic. The TDM pilot sequence may have a cyclic structure within the pre-defined portion of the time slot.
1 Citation
20 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, a code-division multiplexing (CDM) pilot sequence 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 has a pre-defined portion of a time slot where the CDM pilot sequence is non-cyclic; wherein the TDM pilot sequence is composed such that the composite signal has a cyclic structure within the pre-defined portion of the time slot; wherein the cyclic prefix includes a portion of the composite signal; and a processor, communicatively coupled to the receiver, configured to descramble the composite signal with a non-cyclic scrambling sequence, and configured to demodulate the composite signal to recover the data 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 a composite signal, wherein the composite signal includes data, a code-division multiplexing (CDM) pilot sequence 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 has a pre-defined portion of a time slot where the CDM pilot sequence is non-cyclic; wherein the TDM pilot sequence is composed such that the composite signal has a cyclic structure within the pre-defined portion of the time slot; wherein the cyclic prefix includes a portion of the composite signal; descrambling the composite signal with a non-cyclic scrambling sequence; demodulating the composite signal to recover the data 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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17. A network device comprising:
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a transceiver configured to transmit a composite signal, wherein the composite signal includes data, a code-division multiplexing (CDM) pilot sequence 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 has a pre-defined portion of a time slot where the CDM pilot sequence is non-cyclic; wherein the TDM pilot sequence is composed such that the composite signal has a cyclic structure within the pre-defined portion of the time slot; wherein the cyclic prefix includes a portion of the composite signal; wherein the composite signal is descrambled by a non-cyclic scrambling sequence. - View Dependent Claims (18, 19, 20)
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Specification