Space time transmit diversity for TDD/WCDMA systems
AssigneeTexas Instruments Incorporated
InventorsAnand G. Dabak, Timothy M. Schmidl, Chaitali Sengupta
Life of this patent
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Abstract
A circuit is designed with a matched filter circuit including a plurality of fingers (700, 702, 704) coupled to receive a data symbol. Each finger corresponds to a respective path of the data symbol. Each finger produces a respective output signal. A plurality of decoder circuits (706, 708, 710) receives the respective output signal from a respective finger of the plurality of fingers. Each decoder circuit produces a respective output signal. A joint detector circuit (1310) is coupled to receive each respective output signal from the plurality of decoder circuits. The joint detector circuit produces an output signal corresponding to a predetermined code.
Claims27
A circuit, comprising:
- a matched filter circuit coupled to receive a plurality of signals within a time slot, the plurality of signal including a sequence of predetermined signals interposed within a plurality of data signals, the matched filter circuit producing an output signal in response to the data signals;
- and
- a decode circuit coupled to receive the output signal at a first time, the output signal including a first data symbol and a transform of a second data symbol, the decode circuit producing a decoded first data symbol and a decoded second data symbol.
A circuit, comprising:
- a matched filter circuit having a plurality of fingers and coupled to receive a respective plurality of signals, the plurality of signals including a sequence of predetermined signals and a plurality of data signals having a spreading factor of one, the matched filter circuit producing an output signal in response to the data signals;
- a decode circuit coupled to receive the output signal at a first time, the output signal including a first data symbol and a transform of a second data symbol, the decode circuit producing a decoded first data symbol and a decoded second data symbol;
- and
- an equalizer circuit coupled to receive the decoded first data symbol and the decoded second data symbol, the equalizer circuit producing an output signal corresponding to a predetermined code.
A circuit, comprising:
- a matched filter circuit coupled to receive a first data symbol and a transform of a second data symbol at a first time, the matched filter circuit producing an output signal;
- a rake receiver circuit coupled to receive the output signal from the matched filter circuit, the rake receiver circuit producing an output signal corresponding to a plurality of signal paths;
- and
- a joint detector circuit coupled to receive the output signal from the rake receiver circuit, the joint detector circuit producing an output signal corresponding to a predetermined code.
Dependencies are inferred from the claim text.