Legacy compatible spatial multiplexing systems and methods
First Claim
Patent Images
1. A packet generation method, comprising:
- inserting a long training symbol into a first portion of a first packet preamble corresponding to a first packet to be transmitted from a first transmit antenna;
reusing the long training symbol in a second portion of the first packet;
inserting a cyclic shifted long training symbol in a first portion of a second packet preamble corresponding to a second packet to be transmitted from a second transmit antenna; and
reusing the cyclically shifted long training symbol in inverted form in a second portion of the second packet.
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Abstract
Embodiments of legacy compatible spatial multiplexing systems and methods are disclosed. One method embodiment, among others, comprises receiving long training symbols and cyclic shifted long training symbols corresponding to legacy preamble portions of packets corresponding to first and second transmit signals, receiving long training symbols and inverted cyclic shifted long training symbols corresponding to spatial multiplexing portions of packets corresponding to first and second transmit signals, and combining the symbols corresponding to the first and second transmit antennas to estimate the respective channels.
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Citations
26 Claims
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1. A packet generation method, comprising:
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inserting a long training symbol into a first portion of a first packet preamble corresponding to a first packet to be transmitted from a first transmit antenna;
reusing the long training symbol in a second portion of the first packet;
inserting a cyclic shifted long training symbol in a first portion of a second packet preamble corresponding to a second packet to be transmitted from a second transmit antenna; and
reusing the cyclically shifted long training symbol in inverted form in a second portion of the second packet. - View Dependent Claims (2, 3, 4)
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5. A packet reception method, comprising:
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receiving long training symbols and cyclic shifted long training symbols corresponding to legacy preamble portions of packets corresponding to first and second transmit signals;
receiving long training symbols and inverted cyclic shifted long training symbols corresponding to spatial multiplexing portions of packets corresponding to first and second transmit signals; and
combining the symbols corresponding to the first and second transmit antennas to estimate the respective channels. - View Dependent Claims (6, 7, 8)
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9. A packet generation system, comprising:
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a first logic configured to insert a long training symbol into a first portion of a first packet preamble corresponding to a first packet to be transmitted from a first transmit antenna and reusing the long training symbol in a second portion of the first packet; and
a second logic configured to insert a cyclic shifted long training symbol in a first portion of a second packet preamble corresponding to a second packet to be transmitted from a second transmit antenna and reuse the cyclically shifted long training symbol in inverted form in a second portion of the second packet. - View Dependent Claims (10, 11, 12, 13)
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14. A packet reception system, comprising:
a logic configured to receive long training symbols and cyclic shifted long training symbols corresponding to legacy preamble portions of packets corresponding to first and second transmit signals, receive long training symbols and inverted cyclic shifted long training symbols corresponding to spatial multiplexing portions of packets corresponding to first and second transmit signals, and combine the symbols corresponding to the first and second transmit antennas to estimate the respective channels. - View Dependent Claims (15, 16, 17, 18)
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19. A communication system, comprising:
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means for inserting a long training symbol into a first portion of a first packet preamble corresponding to a first packet to be transmitted from a first transmit antenna;
means for reusing the long training symbol in a second portion of the first packet;
means for inserting a cyclic shifted long training symbol in a first portion of a second packet preamble corresponding to a second packet to be transmitted from a second transmit antenna; and
means for reusing the cyclically shifted long training symbol in inverted form in a second portion of the second packet. - View Dependent Claims (20)
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21. A packet generation method, comprising:
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sending a first packet from a antenna, the first packet having a preamble portion and a data portion; and
sending a second packet from a second antenna, the second packet having a cyclic-shifted preamble portion and a cyclic-shifted data portion.
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22. A packet generation system, comprising:
logic configured to send a first packet from a antenna, the first packet having a preamble portion and a data portion and send a second packet from a second antenna, the second packet having a cyclic-shifted preamble portion and a cyclic-shifted data portion.
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23. A packet reception method, comprising:
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receiving a first packet from a first antenna, the first packet having a preamble portion and a data portion; and
receiving a second packet from a second antenna, the second packet having a cyclic-shifted preamble portion and a cyclic-shifted data portion. - View Dependent Claims (24)
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25. A packet reception system, comprising:
logic configured to receive a first packet from a first antenna, the first packet having a preamble portion and a data portion and receive a second packet from a second antenna, the second packet having a cyclic-shifted preamble portion and a cyclic-shifted data portion. - View Dependent Claims (26)
Specification