Method and apparatus for encoding channel quality indicator and precoding control information bits
A method and apparatus for encoding channel quality indicator (CQI) and precoding control information (PCI) bits are disclosed. Each of the input bits, such as CQI bits and/or PCI bits, has a particular significance. The input bits are encoded with a linear block coding. The input bits are provided with an unequal error protection based on the significance of each input bit. The input bits may be duplicated based on the significance of each input bit and equal protection coding may be performed. A generator matrix for the encoding may be generated by elementary operation of conventional basis sequences to provide more protection to a most significant bit (MSB).
1. A method comprising:
determining a quantized amplitude ratio based on whether multipleinput multiple output (MIMO) mode is configured and based on a channel quality indicator (CQI) type when MIMO mode is configured;
deriving a gain factor based on the quantized amplitude ratio; and
weighting a real valued spread value using the gain factor.
2. The method of claim 1 , wherein the quantized amplitude ratio is translated from a variable, and the value of the variable for CQI of type A is greater than the value of the variable for CQI of type B.
3. The method of claim 1 , wherein the quantized amplitude ratio is translated from a variable, and the variable equals a signaled value ΔCQI signaled by a higher layer when MIMO mode is not configured. ΔCQI plus one when MIMO mode is configured and the CQI bits are of type A.
4. The method of claim 1 , wherein the real valued spread value comprises CQI bits, the quantized amplitude ratio is translated from a variable, and the variable equals a signaled value ΔCQI when MIMO mode is configured and the CQI bits are of type B.
5. The method of claim 1 , wherein the quantized amplitude ratio is translated to 38/15 when a signaled value ΔCQI equals to 9.
6. The method of claim 1 , wherein the real valued spread value comprises CQI bits, the quantized amplitude ratio is translated from a variable, and the variable equals a signaled value ΔCQI plus one when MIMO mode is configured and the CQI bits are of type A.
7. The method of claim 6 , wherein the signaled value ΔCQI is signaled by a higher layer.
8. A wireless transmit/receive unit (WTRU) comprising:
a processor configured to:
determine a quantized amplitude ratio based on whether multiple input multiple-output (MIMO) mode is configured and based on a channel quality indicator (CQI) type when MIMO mode is configured,
derive a gain factor based on the quantized amplitude ratio, and
weight a real-valued spread value using the gain factor.
9. The WTRU of claim 8 , wherein the quantized amplitude ratio is translated from a variable, and the value of the variable for CQI of type A is greater than the value of the variable for CQI of type B.
10. The WTRU of claim 8 , wherein the quantized amplitude ratio is translated from a variable, and the variable equals a signaled value ΔCQI signaled by a higher layer when MIMO mode is not configured.
11. The WTRU of claim 8 , wherein the real valued spread value comprises CQI bits, the quantized amplitude ratio is translated from a variable, the quantized amplitude ratio is translated from a variable, and the variable equals a signaled value ΔCQI when MIMO mode is configured and the CQI bits are of type B.
12. The WTRU of claim 8 , wherein the quantized amplitude ratio is translated to 38/15 when a signaled value ΔCQI equals to 9.
13. The WTRU of claim 8 , wherein the real valued spread value comprises CQI bits, the quantized amplitude ratio is translated from a variable, the quantized amplitude ratio is translated from a variable, and the variable equals a signaled value ΔCQI plus one when MIMO mode is configured and the CQI bits are of type A.
14. The WTRU of claim 13 , wherein the signaled value ΔCQI is signaled by a higher layer.