Did You Know...
...that the inventor of the electric motor was a blacksmith named Thomas Davenport? Described as "a brilliantly unsuccessful inventor", Davenport invented the first rotary electric motor. In 1836 he headed out -- on foot -- from his Vermont home to file a patent application at the Patent Office in Washington, D.C. By the time he got there, he had squandered away his money and couldn't afford the $30 filing fee so he turned around and went home. When he later mailed in his application with money he'd raised, the Patent office was destroyed in a fire. He did finally get credit for his invention on Feb. 5, 1837.
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| Number | Title | Issue Date |
| 8027395 | Edge MMSE filters A method for performing channel estimation of an OFDM channel includes, in part, interpolating pilots for sub-channels positioned within a first range of an OFDM symbol, and estimating frequency response of sub-channels positioned within a second range of the OFDM s... | 09/27/2011 |
| 8010070 | Low-complexity diversity using coarse FFT and subband-wise combining A wireless diversity receiver includes, in part, N signal processing paths, a bin-wise combiner, and an inverse transformation module. Each signal processing path includes, in part, a mixer adapted to downconvert a frequency of an RF signal received by that path, an... | 08/30/2011 |
| 7929645 | Method and apparatus for channel estimation in OFDM receivers An efficient channel estimation system and method provides good performance under high Doppler conditions and is suitable for OFDM systems such as DVB-T. A number of different pilot interpolations techniques enable the estimation of channel for the OFDM systems. For... | 04/19/2011 |
| 7917091 | Method and apparatus for calibrating the sideband rejection of a receiver Methods and apparatus for calibrating In-phase and Quadrature imbalance within a receiver are described. A calibration process can inject a calibration tone to an RF or IF portion of a receiver. The receiver can frequency translate the tone to distinct I and Q calib... | 03/29/2011 |
| 7778613 | Dual conversion receiver with programmable intermediate frequency and channel selection A dual conversion receiver architecture that converts a radio frequency signal to produce a programmable intermediate frequency whose channel bandwidth and frequency can be changed using variable low-pass filtering to accommodate multiple standards for television an... | 08/17/2010 |
| 7532870 | Method and apparatus for DC offset removal A DC offset removal method and apparatus for use with a receiver, such as a direct conversion receiver. The DC offset error can be upconverted to an intermediate frequency where it appears as a DC offset spurious signal. The DC offset spurious signal can be amplifie... | 05/12/2009 |
| 7362178 | Wide dynamic range amplifier gain control Linear wide dynamic range variable gain amplifiers can be configured using a variable gain amplifier having an abbreviated gain control range in combination with a discrete attenuator controlled to select an attenuation from a predetermined set of attenuation values... | 04/22/2008 |
