System and method for transmit diversity base upon transmission channel delay spread
First Claim
1. A method of diversity transmission through a wireless channel formed between multiple transmission antennae of a transceiver and a subscriber unit comprising:
- forming a stream of symbols from an incoming data stream;
selecting a plurality of the symbols forming a data vector;
determining a maximum delay spread through the wireless channel;
generating a plurality of diversity vectors based upon the data vector and the maximum delay spread, each diversity vector comprising a plurality of elements; and
simultaneously transmitting corresponding elements of the diversity vectors, each diversity vector transmitted from at least one corresponding antenna of a plurality of spatially separate antennae.
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Abstract
The present invention provides a diversity transmission system. The diversity transmission system includes a method and system of diversity transmission through a wireless channel formed between multiple transmission antennae of a transceiver and a subscriber unit. The method includes forming a stream of symbols from an incoming data stream. A plurality of the symbols are selected forming a data vector. A maximum delay spread through the wireless channel is determined. The maximum delay spread is generally determined as a multiple of a sample time spacing between elements of the data vector. A plurality of diversity vectors are generated based upon the data vector and the maximum delay spread, each diversity vector includes a plurality of elements. Corresponding elements of the diversity vectors are simultaneously transmitted, each diversity vector transmitted from at least one corresponding antenna of a plurality of spatially separate antennae. This embodiment can further include repeatedly simultaneously transmitting corresponding elements of the diversity vectors until all elements of the diversity vectors have been transmitted, each diversity vector transmitted from at least one corresponding antenna of a plurality of spatially separate antennae.
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Citations
29 Claims
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1. A method of diversity transmission through a wireless channel formed between multiple transmission antennae of a transceiver and a subscriber unit comprising:
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forming a stream of symbols from an incoming data stream;
selecting a plurality of the symbols forming a data vector;
determining a maximum delay spread through the wireless channel;
generating a plurality of diversity vectors based upon the data vector and the maximum delay spread, each diversity vector comprising a plurality of elements; and
simultaneously transmitting corresponding elements of the diversity vectors, each diversity vector transmitted from at least one corresponding antenna of a plurality of spatially separate antennae. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. A method of diversity reception through a wireless channel formed between multiple transmission antennae of a transceiver and a subscriber unit comprising:
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receiving a plurality of diversity vectors, the diversity vectors being based upon a data vector and a maximum delay spread through the wireless channel, the data vector being formed from a plurality of symbols received by the transceiver;
estimating transmitted symbols from the received diversity vectors. - View Dependent Claims (26)
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27. A diversity transmitter for providing transmission through a wireless channel formed between multiple transmission antennae of a transceiver and a subscriber unit, the diversity transmitter comprising:
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an encoder that receives and encodes a bit stream;
a mapper that maps the encoded bit stream into symbols;
a block former for selecting blocks of the symbols;
means for determining a maximum delay spread through the wireless channel;
means for generating a plurality of diversity vectors based upon the data vector and the maximum delay spread, each diversity vector comprising a plurality of elements; and
a plurality of transmit antenna for transmitting the transmit vectors. - View Dependent Claims (28, 29)
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Specification