CalAmp Awarded Patents for Smart Antenna Technology
July 18, 2008
CalAmp Corp. was awarded two new U.S. patents titled “Calibration methods and structures in wireless communications systems” (No. 7,392,015) and Adaptive beamforming methods and systems that enhance and reduce computations (No. 7,339,979). These patents cover technology used in adaptive antenna systems.
The first patent describes a system and method for wireless transceivers that receive and transmit signals from an array of antennas connected to spatial processing channels. The patent covers calibration methods and structures that compensate for the relative gain and phase errors of transceivers utilizing frequency-domain spatial processing algorithms. The second patent describes computational methods to increase real-time performance and reduce implementation complexity and cost by processing spatial information progressively on delay-optimized sub-arrays. CalAmp was previously awarded three other patents related to smart antenna technology: “Wireless communications structures and methods utilizing frequency domain spatial processing” (No. 7,072,693); “Wireless communication structures and methods with enhanced range and performance” (No. 7,035,652); and “Spatial-temporal methods and systems for reception of non-line of-sight communication signals” (No. 6,947,507). Although this technology may sound like it’s too complex for consumer services, CalAmp sees it being leveraged to enhance the performance of networks using WiFi, WiMAX, broadband “white space” UHF and 700 MHz mobile frequencies. It may also find use in ATSC mobile TV applications. CalAmp said the complex spatial processing cancels interference by better utilizing high multipath, non-line-of-sight channels, substantially improving data throughput and reducing “dead spots.” More information is available at www.calamp.com.
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