Rob S. - re: OFDM and smart antenna
While you are correct that Q hasn't asserted or declared any of their patents to 802.11 & .16, isn't it interesting that they attend and participate in both standards group meetings (search IEEE yourself)? While I will not make claim that the below patents are part of 4G, .11 or .16, they do show just a small part of the work QCOM has patented in the areas surrounding OFDM and smart antennae (there are many more on USPTO and Euro esp@cenet )
Have a nice day B^)
United States Patent 6,282,168
Vijayan , et al. August 28, 2001
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Bit interleaving for orthogonal frequency division multiplexing in the transmission of digital signals
Abstract
In an orthogonal frequency division multiplexing (OFDM) system which uses an outer Reed-Solomon encoder and interleaver an inner convolutional encoder, after the inner convolutional encoding the data bits are interleaved, and then grouped into symbols, each symbol having "m" bits. After grouping, the symbols are mapped to a complex plane using quadrature amplitude modulation (QAM). Thus, bits, not symbols, are interleaved by the inner interleaver. A receiver performs a soft decision regarding the value of each bit in each complex QAM symbol received.
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Inventors: Vijayan; Rajiv (San Diego, CA); Odenwalder; Joseph P. (Del Mar, CA); Wolf; Jack K. (La Jolla, CA); Lee; Chong U. (San Diego, CA); Zehavi; Ephraim (Haifa, IL)
Assignee: Qualcomm Inc. (San Diego, CA)
Appl. No.: 433600
Filed: November 2, 1999
Current U.S. Class: 370/203; 375/341; 714/794
Intern'l Class: H04J 011/00; H03D 001/00; H04L 027/06; H03M 013/12; G06F 011/10
Field of Search: 375/331,332,269,329,273,279,280,344,130,260-262,341 370/208,209,203,204 714/794
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United States Patent 5,621,752
Antonio , et al. April 15, 1997
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Adaptive sectorization in a spread spectrum communication system
Abstract
A system and method for adaptively sectorizing channel resources within a digital cellular communication system is disclosed herein. The system includes an antenna arrangement for providing at least first and second electromagnetic beams for receiving a first information signal transmitted by a specific one of a plurality of users, thereby generating first and second received signals. A first set of beam-forming signals are then generated from the first and second received signals. A demodulating receiver is provided for demodulating at least first and second beam-forming signals included within the first set of beam-forming signals, thereby producing first and second demodulated signals. The system further includes a tracking network for tracking multipath information signals, received from various positions and angles of incidence, based on comparison of the first and second demodulated signals.
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Inventors: Antonio; Franklin P. (Del Mar, CA); Gilhousen; Klein S. (Bozeman, MT); Wolf; Jack K. (La Jolla, CA); Zehavi; Ephraim (San Diego, CA)
Assignee: Qualcomm Incorporated (San Diego, CA)
Appl. No.: 265664
Filed: June 23, 1994
Current U.S. Class: 375/144; 370/335; 375/347; 375/367
Intern'l Class: H04B 015/00; H04K 001/00; H04L 027/30
Field of Search: 375/200-208,260,264,267,316,347,349,367,205 455/432-135,277.1,277.2,278.1,279.1,140 370/18,95.1 |
