Method and apparatus for encoding channel quality indicator and precoding control information bits

A wireless transmit/receive unit (WTRU) for encoding type B information bits, the WTRU comprising:

• a data generator for generating type B information bits including channel quality indicator (CQI) bits and precoding control information (PCI) bits;
• an encoder for encoding the type B information bits using a (20, 7) code to generate an output codeword, a minimum distance of the (20, 7) code being eight (8), weight distribution of the (20, 7) code providing better protection to a most significant bit (MSB) of the CQI bits;
• and
• a transmitter for sending the output codeword.

A method for encoding channel quality indicator (CQI) bits in a wireless transmit/receive unit (WTRU), the method comprising:

• generating CQI bits;
• encoding the CQI bits;
• applying a gain factor Bhs to the CQI bits;
• and
• sending the encoded CQI bits, wherein the gain factor βhs, for the CQI bits is derived from a quantized amplitude ratio (Ahs =βhs/βc), βc being a gain factor for a dedicated physical control channel (DPCCH), and wherein if the WTRU is configured in multiple-input multiple-output(MIMO) mode, Ahs equals the quantized amplitude ratio translated from a signaled value ΔCQI+1 when a CQI of type A is transmitted.

A wireless transmit/receive unit (WTRU) for encoding channel quality indicator (CQI) bits, the WTRU comprising:

• a CQI generator for generating CQI bits;
• an encoder for encoding the CQI bits;
• and
• a transmitter for applying a gain factor βhs to the CQI bits and sending the encoded CQI bits, wherein the gain factor βhs for the CQI bits is derived from a quantized amplitude ratio (Ahs =βhs/βc), βc being a gain factor for a dedicated physical control channel (DPCCH), and wherein Ahs equals to the quantized amplitude ratio translated from a signaled value ΔCQI+1 when a CQI of type A is transmitted.