Inserting and decoding replicated data symbols in wireless communications
View Patent ↗Examples are generally described that include transmission methods including inserting at least a portion of data from a first data stream into a second data stream to be transmitted over a communications channel. On receipt of the two data streams, examples of receiving methods include receiving the replicated data, decoding the replicated data using an estimated channel matrix, and generating an updated estimate of the channel matrix based, at least in part, on the replicated data.
1. A method of decoding a signal transmitted over a communications channel, the method comprising:
receiving a pilot symbol over the communications channel;
estimating a channel matrix of the communications channel based, at least in part, on the pilot symbol;
receiving replicated data from multiple data streams transmitted over the communications channel;
decoding the replicated data using the estimated channel matrix;
generating an updated estimate of the channel matrix based, at least in part, on the replicated data; and
decoding subsequently received signals over the communications channel using the updated estimate of the channel matrix.
2. The method of claim 1 wherein said decoding the replicated data comprises using a joint detection technique.
3. The method of claim 1 , wherein said decoding the replicated data comprises using a space-time block decoding technique.
4. The method of claim 1 , wherein said decoding the replicated data comprises using a space-frequency block decoding technique.
5. The method of claim 1 , wherein the replicated data includes same data symbols in multiple data streams.
6. A communication device comprising:
a receiver configured to receive signals over a communications channel, wherein the signals are based at least in part on first and second data streams transmitted over a communications channel, wherein the second data stream includes at least one data symbol replicated from the first data stream;
a decoder coupled to the receiver and the channel estimator, wherein the decoder is configured to receive the received signals and decode the at least one data symbol replicated from the first data stream;
a channel estimator coupled to the decoder and the receiver, wherein the channel estimator is configured to receive the received signals and the decoded at least one data symbol, wherein the channel estimator is configured to estimate a channel matrix of the communications channel based, at least in part, on the decoded at least one data symbol; and
wherein the decoder is further configured to decode subsequent received signals based, at least in part, on the estimate of the channel matrix.
7. The communication device of claim 6 wherein the decoder is configured to decode the at least one data symbol using a joint detection technique.
8. The communication device of claim 6 wherein the first and second data streams each further include at least one pilot symbol, and wherein the channel estimator is configured to receive the at least one pilot symbol and generate an initial estimate of the channel matrix based, at least in part on the at least one pilot symbol.