Transmitting apparatus, receiving apparatus and multiplex number controlling method
First Claim
Patent Images
1. A receiving apparatus comprising:
- a receiving section that receives a signal comprised of streams which are spatially multiplexed;
a spatial demultiplexing capacity estimating section that estimates a capacity for demultiplexing the signal into the streams by detecting an error of the signal and obtaining an error rate for each of a plurality of multiplexing numbers, each multiplexing number being a number of the streams that are spatially multiplexed;
an offset setting section that sets an offset value for each of the multiplexing numbers, respectively, based on the obtained error rate using a predetermined association between the obtained error rate and the offset value, the offset values being used for controlling a first multiplexing number from among the multiplexing numbers;
a received quality measuring section that measures received quality of each of the streams; and
a feedback section that feeds back, to a transmitting apparatus, information indicating each of the offset values and the received quality.
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Accused Products
Abstract
A spatial multiplex number controlling method and others wherein streams can be separated for each of receivers and the transmission efficiency can be improved. In a receiving apparatus, a PER is calculated from a history of CRC test results per stream multiplex number. A reception quality and an offset corresponding to the calculated PER are fed back to a transmitting apparatus. The transmitting apparatus assigns, based on the fed-back reception quality and offset, the streams, thereby controlling the stream multiplex number.
17 Citations
10 Claims
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1. A receiving apparatus comprising:
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a receiving section that receives a signal comprised of streams which are spatially multiplexed; a spatial demultiplexing capacity estimating section that estimates a capacity for demultiplexing the signal into the streams by detecting an error of the signal and obtaining an error rate for each of a plurality of multiplexing numbers, each multiplexing number being a number of the streams that are spatially multiplexed; an offset setting section that sets an offset value for each of the multiplexing numbers, respectively, based on the obtained error rate using a predetermined association between the obtained error rate and the offset value, the offset values being used for controlling a first multiplexing number from among the multiplexing numbers; a received quality measuring section that measures received quality of each of the streams; and a feedback section that feeds back, to a transmitting apparatus, information indicating each of the offset values and the received quality. - View Dependent Claims (2, 3, 4, 5)
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6. A transmitting apparatus for communicating with a receiving apparatus that includes a receiving section that receives a signal comprised of streams which are spatially multiplexed;
- a spatial demultiplexing capacity estimating section that estimates a capacity for demultiplexing the signal into the streams by detecting an error of the signal and obtaining an error rate for each of a plurality of multiplexing numbers, each multiplexing number being a number of the streams that are spatially multiplexed;
an offset setting section that sets an offset value for each of the multiplexing numbers, respectively, based on the obtained error rate using a predetermined association between the obtained error rate and the offset value, the offset values being used for controlling a first multiplexing number from among the multiplexing numbers;
a received quality measuring section that measures received quality of each of the streams; and
a feedback section that feeds back, to a transmitting apparatus, information indicating each of the offset values and the received quality, the transmitting apparatus comprising;a stream assigning section that controls the first multiplexing number of the streams by obtaining the information indicating the offset values and the received quality, fed back from the receiving apparatus, and by carrying out an assignment of the streams based on the offset values and the received quality indicated by the obtained information; and a transmission processing section that performs transmission processing of the signal comprised of the assigned streams which are spatially multiplexed. - View Dependent Claims (7, 8)
- a spatial demultiplexing capacity estimating section that estimates a capacity for demultiplexing the signal into the streams by detecting an error of the signal and obtaining an error rate for each of a plurality of multiplexing numbers, each multiplexing number being a number of the streams that are spatially multiplexed;
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9. A spatial multiplexing control method comprising:
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at a receiving apparatus; receiving a signal comprised of streams which are spatially multiplexed; estimating a capacity for demultiplexing the signal into the streams by detecting an error of the signal and obtaining an error rate for each of a plurality of multiplexing numbers, each multiplexing number being a number of the streams that are spatially multiplexed; setting an offset value for each of the multiplexing numbers, respectively, based on the obtained error rate using a predetermined association between the obtained error rate and the offset value, the offset values being used for controlling a first multiplexing number from among the multiplexing numbers; measuring received quality of each of the streams; and feeding back, to a transmitting apparatus, information indicating each of the offset values and the received quality, and at the transmitting apparatus; controlling the first multiplexing number of the streams by carrying out an assignment of the streams based on the information fed back from the receiving apparatus, indicating the offset values and the received quality fed back from the receiving apparatus.
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10. A communication system comprising a receiving apparatus and a transmitting apparatus, wherein:
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the receiving apparatus comprises; a receiving section that receives a signal comprised of streams which are spatially multiplexed; a spatial demultiplexing capacity estimating section that estimates a capacity for demultiplexing the signal into the streams; an offset setting section that sets an offset value for each of a plurality of multiplexing numbers, respectively, based on an obtained error rate using a predetermined association between the obtained error rate and the offset value, the offset values being used for controlling a first multiplexing number from among the multiplexing numbers; a received quality measuring section that measures received quality of each of the streams; and a feedback section that feeds back, to the transmitting apparatus, information indicating each of the offset values and the received quality; and the transmitting apparatus comprises; a stream assigning section that controls the first multiplexing number of the streams by obtaining the information indicating the offset values and the received quality, fed back from the receiving apparatus, and by carrying out an assignment of the streams based on the offset values and the received quality indicated by the obtained information; and a transmission processing section that performs transmission processing of the signal comprised of the assigned streams.
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Specification