Adaptive modulation coding system and method in a mobile communication network
First Claim
1. A signal coding apparatus for a mobile communication system, the apparatus comprising:
- an adaptive modulation and coding (AMC) receiver of a mobile communication terminal for BLAST-decoding signals received from a plurality of reception antennas of the mobile communication terminal to produce a first output, and using the first output to produce a second output generated by the mobile communication terminal, the second output comprising estimate forward channel characteristics for a plurality of transmission antennas in an AMC transmitter of a base station in communication with the mobile communication terminal;
wherein the AMC transmitter of the base station is configured for;
selecting at least one adaptive coding rate and at least one modulation method according to the estimated forward channel characteristics in the second output provided by the mobile communication terminal,coding and modulating a plurality of transmission signal layers generated for transmission by the plurality of transmission antennas according to the selected adaptive coding rate and modulation method, andtransmitting the plurality of transmission signal layers to the plurality of transmission antennas simultaneously by way of BLAST-coding.
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Abstract
An encoding method in a mobile communication system is provided. The method comprises selecting at least one adaptive coding rate and at least one modulation method according to estimated forward channel characteristics for a plurality of transmission antennas, based on BLAST-decoded signals received from a plurality of reception antennas; coding and modulating a plurality of transmission signal layers generated for transmission by the plurality of transmission antennas according to the selected adaptive coding rate and modulation method; and transmitting the plurality of transmission signal layers to the plurality of transmission antennas simultaneously by way of V-BLAST-coding.
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Citations
34 Claims
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1. A signal coding apparatus for a mobile communication system, the apparatus comprising:
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an adaptive modulation and coding (AMC) receiver of a mobile communication terminal for BLAST-decoding signals received from a plurality of reception antennas of the mobile communication terminal to produce a first output, and using the first output to produce a second output generated by the mobile communication terminal, the second output comprising estimate forward channel characteristics for a plurality of transmission antennas in an AMC transmitter of a base station in communication with the mobile communication terminal; wherein the AMC transmitter of the base station is configured for; selecting at least one adaptive coding rate and at least one modulation method according to the estimated forward channel characteristics in the second output provided by the mobile communication terminal, coding and modulating a plurality of transmission signal layers generated for transmission by the plurality of transmission antennas according to the selected adaptive coding rate and modulation method, and transmitting the plurality of transmission signal layers to the plurality of transmission antennas simultaneously by way of BLAST-coding. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A mobile terminal in communication with a base station in a mobile communications network, the mobile terminal comprising an adaptive modulation and coding (AMC) system wherein the AMC system comprises an AMC receiver for BLAST-decoding signals received from a plurality of reception antennas of the mobile terminal to produce a first output, and using the first output to produce a second output generated by the mobile communication terminal, the second output comprising estimate forward channel characteristics for a plurality of transmission antennas of the base station in communication with the mobile communication terminal;
wherein the AMC transmitter of the base station is configured for selecting at least one adaptive coding rate and at least one modulation method according to the estimated forward channel characteristics in the second output provided by the mobile communication terminal. - View Dependent Claims (15)
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16. A base station in a mobile communications network in communication with a mobile terminal, the base station comprising an adaptive modulation and coding (AMC) system wherein the AMC system comprises an AMC transmitter comprising:
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at least one antenna for receiving forward channel characteristics information estimated by a mobile communication terminal in communication with the base station; a first logic unit for selecting at least one adaptive coding rate and at least one modulation method according to forward channel characteristics information estimated by the mobile terminal in communication with the base station, wherein the first logic unit produces a first output comprising data indicative of the adaptive coding rate; wherein the first logic unit uses the first output to produces a second output generated by the mobile communication terminal, the second output comprising estimate forward channel characteristics for a plurality of transmission antennas of the base station in communication with the mobile communication terminal indicative of the modulation method;
wherein the AMC transmitter of the base station is configured for selecting at least one adaptive coding rate and at least one modulation method according to the estimated forward channel characteristics in the second output provided by the mobile communication terminal;a second logic unit for coding and modulating a plurality of transmission signal layers generated for transmission by a plurality of transmission antennas according to the first and second outputs, and a third logic unit for transmitting the plurality of transmission signal layers to the plurality of transmission antennas simultaneously by way of BLAST-coding. - View Dependent Claims (17, 18, 19, 20)
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21. An adaptive modulation coding (AMC) method for a mobile communication system, the method comprising:
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receiving, in a base station, BLAST-decoded signals transmitted by a plurality of transmission antennas of a mobile terminal in communication with said base station, wherein the BLAST-decoded signals comprise forward channel characteristics information as estimated by the mobile communication terminal; selecting at least one adaptive coding rate and at least one modulation method according to the estimated forward channel characteristics information associated with a plurality of transmission antennas in the base station; generating a first signal indicative of the adaptive coding rate; generating a second signal indicative of the modulation method; coding and modulating a plurality of transmission signal layers generated for transmission by the plurality of transmission antennas according to the first and second signals; and transmitting the plurality of transmission signal layers to the plurality of transmission antennas simultaneously by way of V-BLAST-coding. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29)
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30. A signal coding apparatus for a mobile communication system, the apparatus comprising:
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an adaptive modulation and coding (AMC) receiver of a mobile communication terminal for decoding signals received from a plurality of reception antennas of the mobile communication terminal to estimate forward channel characteristics for a plurality of transmission antennas in an AMC transmitter of a base station in communication with the mobile communication terminal; wherein the AMC transmitter of the base station is configured for; selecting at least one adaptive coding rate and at least one modulation method according to the estimated forward channel characteristics; coding and modulating a plurality of transmission signal layers generated for transmission by the plurality of transmission antennas according to the selected adaptive coding rate and modulation method; and transmitting the plurality of transmission signal layers to the plurality of transmission antennas simultaneously. - View Dependent Claims (31, 32, 33, 34)
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Specification