Methods and apparatus for dynamic acknowledgement list selection in detection of uplink control channel formats
Methods and apparatus for dynamic acknowledgement list selection in detection of uplink control channel formats. In an exemplary embodiment, an apparatus includes a dynamic acknowledgement (ACK) list allocation circuit that generates a dynamic ACK list that includes one or two most likely ACK candidates, and a top-Q candidate CQI bits detector that dynamically allocates a detection branch to each of the one or two most likely ACK candidates to detect top-Q candidate CQI bits. The apparatus also includes a merger circuit that mergers the top-Q candidate CQI bits detected for the one or two most likely ACK candidates to generate a merged list, a top-Q CQI symbol generator that generates top-Q CQI symbols for the top-Q candidate CQI bits detected for the one or two most likely ACK candidates, and a joint detector that detects transmitted CQI bits and ACK bits.
1. An apparatus for wireless data transmission comprising:
a Channel Quality Indicator (“CQI”) encoder configured to encode a set of CQI encoded bits containing a predefined number of bits in accordance with CQI information bits;
a scrambler coupled to the CQI encoder and configured to scramble the set of CQI encoded bits from the CQI encoder to generate a group of scrambled bits in response to a scrambling sequence;
a modulator coupled to the scrambler and operable to generate a block of complex-valued modulation symbols in accordance with the group of scrambled bits from the scrambler; and
a symbol generator coupled to the modulator and configured to facilitate generation of symbols including information relating to channel qualities in response to the block of complex-valued modulation symbols.
2. The apparatus of claim 1 , wherein the CQI encoder is a Reed-Muller encoder operable to encode information formatted in according to physical uplink control channel (“PUCCH”) format 2.
3. The apparatus of claim 1 , further comprising a scrambling code generator coupled to the scrambler and configured to generate the scrambling sequence in response to a user equipment (“UE”) specific scrambling sequence.
4. The apparatus of claim 1 , wherein the modulator is a Quadrature Phase Shift Keying (“QPSK”) modulator configured to modulate the group of scrambled bits via QPSK to generate modulated complex symbols.
5. The apparatus of claim 1 , wherein the symbol generator includes multiple orthogonal frequency-division multiplexing (“OFDM”) symbol generators operable to generate OFDM symbols based on the complex-valued modulation symbols.
6. The apparatus of claim 5 , wherein each of the OFDM symbol generators includes a plurality of Inverse Fast Fourier Transform (“IFFY”) circuits configured to generate single-carrier frequency division multiple access (“SC-FDMA”) signal for each symbol based on the complex-valued modulation symbols.
7. The apparatus of claim 1 , further comprising a symbol splitter coupled to the modulator and configured to split the complex-valued modulation symbols before forwarding the complex-valued modulation symbols to the symbol generator.
8. The apparatus of claim 1 , further comprising a second modulator coupled to the symbol generator and configured to modulate information located at a predefined bit position of the CQI information bits for generation of modulation symbol.
9. The apparatus of claim 8 , wherein the second modulator processes at least a portion of information formatted in physical uplink control channel (“PUCCH”) format 2a.
10. The apparatus of claim 8 , wherein the second modulator processes at least a portion of information formatted in physical uplink control channel (“PUCCH”) format 2b.
11. A method for transmitting wireless data comprising:
encoding, via a Channel Quality Indicator (“CQI”) encoder, a set of CQI encoded bits containing a predefined number of bits in accordance with CQI information bits;
scrambling the set of CQI encoded bits from the CQI encoder to generate a group of scrambled bits in response to a scrambling sequence;
modulating the group of scrambled bits from a scrambler to generate a block of complex-valued modulation symbols;
forwarding the block of complex-valued modulation symbols to a plurality of symbol generators; and
generating orthogonal frequency-division multiplexing (“OFDM”) symbols based on the complex-valued modulation symbols.
12. The method of claim 11 , further comprising generating single-carrier frequency division multiple access (“SC-FDMA”) signals based on the complex-valued modulation symbols.
13. The method of claim 11 , further comprising transmitting SC-FDMA signals to an antenna via a radio frequency (“RF”) front-end.
14. The method of claim 11 , further comprising encoding and modulating information formatted in accordance to physical uplink control channel (“PUCCH”) format 2.
15. The method of claim 11 , further comprising encoding and modulating information formatted in accordance to physical uplink control channel (“PUCCH”) format 2a.
16. The method of claim 11 , further comprising encoding and modulating information formatted in accordance to physical uplink control channel (“PUCCH”) format 2b.
17. An apparatus for transmitting wireless data comprising:
means for encoding a set of CQI encoded bits containing a predefined number of bits in accordance with CQI information bits;
means for scrambling the set of CQI encoded bits from the CQI encoder to generate a group of scrambled bits in response to a scrambling sequence;
means for modulating the group of scrambled bits from a scrambler to generate a block of complex-valued modulation symbols;
means for forwarding the block of complex-valued modulation symbols to a plurality of symbol generators; and
means for generating orthogonal frequency-division multiplexing (“OFDM”) symbols based on the complex-valued modulation symbols.
18. The apparatus of claim 17 , further comprising means for generating single-carrier frequency division multiple access (“SC-FDMA”) signals based on the complex-valued modulation symbols.
19. The apparatus of claim 17 , further comprising means for transmitting SC-FDMA signals to an antenna via a radio frequency (“RF”) front-end.
20. The apparatus of claim 17 , further comprising means for encoding and modulating information formatted in accordance to physical uplink control channel (“PUCCH”) format 2.