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Timothy M Schmidl, Donald C Cox: Timing and frequency synchronization of OFDM signals. Stanford University, Lumen Intellectual Property Services, March 24, 1998: US05732113 (356 worldwide citation)

A method and apparatus achieves rapid timing synchronization, carrier frequency synchronization, and sampling rate synchronization of a receiver to an orthogonal frequency division multiplexed (OFDM) signal. The method uses two OFDM training symbols to obtain full synchronization in less than two da ...


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Timothy M Schmidl, Mohammed Nafie, Anand G Dabak: Wireless communications with frequency band selection. Texas Instruments Incorporated, Ronald O Neerings, Wade James Brady III, Frederick J Telecky Jr, May 23, 2006: US07050402 (83 worldwide citation)

A probe, listen and select (PLS) technique can be used to select from an available frequency spectrum a frequency band whose communication quality is suitable for wireless communication at a desired rate. Probe packets can be transmitted on different frequencies (223) during a known period of time ( ...


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Timothy M Schmidl, Sundararajan Sriram: Frequency bin method of initial carrier frequency acquisition. Texas Instruments Incorporated, Ronald O Neerings, Wade James Brady III, Frederick J Telecky Jr, October 5, 2004: US06801567 (67 worldwide citation)

A frequency bin method of carrier frequency acquisition uses a plurality of predetermined carrier frequency offset bins. A single bin is selected from among the plurality of bins. A local VCO is then adjusted to remove the carrier frequency offset associated with the single selected bin. Carrier fre ...


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Anand G Dabak, Srinath Hosur, Timothy M Schmidl: Use of Walsh-Hadamard transform for forward link multiuser detection in CDMA systems. Texas Instruments Incorporated, Carlton H Hoel, W James Brady, Frederick J Telecky Jr, September 28, 2004: US06798737 (53 worldwide citation)

A station capable of receiving information containing Walsh coding for a plurality of channels and canceling interference from the received information and the method of cancellation. A memory is provided for storing received signals containing a Walsh code for each of a plurality of channels as wel ...


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Timothy M Schmidl: Spread spectrum interference cancellation. Texas Instruments Incorporated, Carlton H Hoel, W James Brady, Frederick J Telecky Jr, November 9, 2004: US06816541 (43 worldwide citation)

Iterative parallel interference cancellation estimations for signals received from multiple coded sources or a source with multiple coded outputs with updated estimates of interfering signals used during an iteration.


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Eko N Onggosanusi, Anand G Dabak, Timothy M Schmidl: Wireless system with hybrid automatic retransmission request in interference-limited communications. Texas Instruments Incorporated, Ronald O Neerings, Wade J Brady III, Frederick J Telecky Jr, November 13, 2007: US07295624 (35 worldwide citation)

A wireless receiver for receiving signals from an interference-limited transmitter in an interference-limited system comprising at least one transmit antenna, wherein the signals comprise a plurality of symbols. The receiver comprises a plurality of receive antennas and collection circuitry for coll ...


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Eko N Onggosanusi, Anand G Dabak, Timothy M Schmidl: High data rate closed loop MIMO scheme combining transmit diversity and data multiplexing. Texas Instruments Incorporated, Carlton H Hoel, W James Brady, Frederick J Telecky Jr, February 20, 2007: US07181167 (34 worldwide citation)

Closed loop multiple-antenna wireless communications system with antenna weights determined by maximizing a composite channel signal-to-interference-plus-noise ratio minimum. Multiplexed symbol streams over subsets of antennas enhance throughput.


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