Signal processing apparatus and method using multi-output mobile communication system
The present invention provides a signal processing in applying HARQ to an MIMO system, by which error-detecting information enabling to decide whether a received signal is erroneous is appended for transmission. The present invention appends CRC to the data block transported from a higher layer so that HARQ can be efficiently applied to the MIMO system. The present invention segments the CRC-appended data block and then transmits the segmented data blocks via a plurality of antennas. Data streams generated from the segmented data blocks are independent from each other in coding scheme and modulation.
1. A signal processing method for transmitting data using a plurality of antennas in a mobile communication system, the method comprising:
receiving transport block data;
appending error correction bits to the transport block data;
generating channel coded data from the transport block data appended with the error correction bits;
performing spatial segmentation on the channel coded data to provide a plurality of spatially segmented data blocks;
independently performing rate matching on each of the plurality of spatially segmented data blocks to generate a plurality of data streams and to provide a plurality of independent modulation schemes, wherein each of the plurality of independent modulation schemes corresponds to one of the plurality of data streams;
independently performing modulation on each of the plurality of data streams by independently applying each of the plurality of independent modulation schemes to each corresponding data stream in the plurality of data streams; and
independently performing physical channel mapping for each of the plurality of data streams to be transmitted to a receiving side via each of a plurality of physical channels,
wherein the rate matching is performed after the spatial segmentation, and wherein the modulation is performed after the rate matching.
2. The method of claim 1 , wherein a size of each of the plurality of segmented data blocks is proportionally determined based on a data rate capacity of each of the plurality of data streams to be transmitted using the plurality of physical channels.
3. The method of claim 2 , wherein the size of each of the plurality of segmented data blocks corresponds to a code rate of a channel coder, and wherein the size of each of the plurality of segmented data blocks is a multiple of a number of output bits associated with the code rate.
4. The method of claim 1 , wherein a size of each of the plurality of segmented data blocks corresponds to a code rate of a channel coder, and when the code rate is ⅓, the size of each of the plurality of segmented data blocks is a multiple of 3.
5. The method of claim 1 , wherein a plurality of code rates are concurrently used for the plurality of data streams to be transmitted using the plurality of physical channels.
6. The method of claim 1 , further comprising:
generating physical channel segmentation data for each of the plurality of data streams to be transmitted using the plurality of physical channels.
7. A signal processing method for transmitting data using a plurality of antennas in a mobile communication system, the method comprising:
appending error correction bits to transport block data;
performing spatial segmentation on the transport block data appended with error correction bits to provide a plurality of spatially segmented data blocks;
independently performing channel coding on each of the plurality of spatially segmented data blocks to generate a plurality of channel coded data blocks;
independently performing rate matching on each of the plurality of channel coded data blocks to generate a plurality of data streams and to provide a plurality of independent modulation schemes, wherein each of the plurality of independent modulation schemes corresponds to one of the plurality of data streams;
independently performing modulation on each of the plurality of data streams by independently applying each of the plurality of modulation schemes to each corresponding data stream in the plurality of data streams; and
independently performing physical channel mapping for each of the plurality of data streams to be transmitted to a receiving side via each of a plurality of physical channels,
wherein the rate matching is performed after the spatial segmentation, and wherein the modulation is performed after the rate matching.
8. The method of claim 7 , wherein a bit scrambling is performed before performing the spatial segmentation.
9. The method of claim 7 , wherein a bit scrambling is performed after performing the spatial segmentation.
10. The method of claim 7 , wherein a size of each of the plurality of segmented data blocks is proportionally determined based on a data rate capacity of each of the plurality of data streams to be transmitted using the plurality of physical channels, and wherein the size of each of the plurality of segmented data blocks is a multiple of a code rate of a channel coder.
11. The method of claim 10 , wherein the size of each of the plurality of segmented data blocks is a multiple of a number of output bits associated with the code rate.
12. The method of claim 7 , wherein a code rate of a channel coder is ⅓ and the size of each of the plurality of segmented data blocks is a multiple of 3.
13. The method of claim 7 , wherein a plurality of code rates are concurrently used for the plurality of data streams to be transmitted using the plurality of physical channels.
14. The method of claim 7 , further comprising:
generating physical channel segmentation data for each of the plurality of data streams to be transmitted using the plurality of physical channels.