CQI coding method for HSDPCCH
First Claim
1. A channel quality information (CQI) coding method of wireless communication system for increasing downlink channel capacity by improving accuracy of a CQI which is received through an uplink channel, wherein the CQI coding method is characterized in that the CQI is encoded in such a manner that information bits of the CQI are assigned different significances.
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Abstract
In the channel quality information (CQI) coding method of the present invention, first basis sequences for generating subcodes of 32 bits are created, and second basis sequences for generating codewords of 20 bits are created using the first basis sequences, the second basis sequence maximizing system throughput such that five information bits are coded into CQI code using the second basis sequences. Also, since HSDPA system has been designed in order to increase the system throughput, the CQI coding method of the present invention, which shows the best system throughput in the simulation, can be the optimum CQI coding scheme for HSDPCCH.
60 Citations
24 Claims
 1. A channel quality information (CQI) coding method of wireless communication system for increasing downlink channel capacity by improving accuracy of a CQI which is received through an uplink channel, wherein the CQI coding method is characterized in that the CQI is encoded in such a manner that information bits of the CQI are assigned different significances.

3. A channel quality information (CQI) coding method comprising:

creating first basis sequences for generating subcodes of 32 bits;
creating second basis sequences for generating codewords of 20 bits using the first basis sequences, the second basis sequences maximizing system throughput; and
encoding a predetermined number of information bits into CQI codes using the second basis sequences.  View Dependent Claims (4, 5, 6, 7, 8)


9. A channel quality information (CQI) coding method comprising:

a) creating first basis sequences for generating subcodes of 32 bits;
b) puncturing each of the subcodes in a predetermined bit pattern in order to maximize system throughput;
c) repeating a predetermined bit of each subcode for predetermined times in order to maximize system throughput; and
d) encoding 5 information bits into CQI codes using a second basis sequences generated through (b) and (c).  View Dependent Claims (10, 11, 12)


13. A channel quality information (CQI) coding method comprising:

inputting 5 information bits;
generating 32 bit subcodes with the information bits using a basis sequences;
generating 20 bit codewords by puncturing 16 bits from each of the subcodes in a predetermined bit pattern and repeating a predetermined bit of the subcode in order to maximize system throughput.  View Dependent Claims (14, 15, 16)


17. A channel quality information (CQI) coding method comprising;

(a) creating first basis sequences for generating (32,
5) expurgated TFCI code from (32,
10) TFCI code;
b) puncturing each of the (32,
5) expurgated TFCI codes in a predetermined bit pattern in order to maximize system throughput;
c) repeating a predetermined bit of each (32,
5) expurgated TFCI code for predetermined times in order to maximize system throughput; and
d) encoding 5 information bits into CQI codes using a second basis sequences generated through (b) and (c).  View Dependent Claims (18, 19, 20, 21)


22. A channel quality information (CQI) coding method comprising
(a) obtaining first basis sequences from (16, 5) TFCI code; 
(b) extending basis sequences to second basis sequences for (20,
5) CQI code in a predetermined pattern in order to maximize system throughput; and
(c) encoding 5 information bits into CQI codes using a second basis sequences generated through (a) and (b).  View Dependent Claims (23)


24. A channel quality information (CQI) coding method comprising
(a) encoding 5 information bits into (16, 5) TFCI codes using (16, 5) TFCI basis sequences (b) repeating the MSB of information bits 4 times in order to maximize system throughput.
Specification