1
John M Kowalski, Srinivas Kandala, V Srinivasa Somayazulu: System and method for CDMA channel estimation. Sharp Laboratories of America, David C Ripma, Matthew D Rabdau, Scott Krieger, March 27, 2001: US06208632 (39 worldwide citation)

A wideband CDMA receiver system to accept messages from asynchronously transmitting base stations is provided. The base station transmission to each receiver includes a perch channel and at least one traffic channel. Although all the channels typically include pilot symbols for the purpose of demodu ...


2
John M Kowalski, Srinivas Kandala, V Srinivasa Somayazulu: Pilot aided, time-varying finite impulse response, adaptive channel matching receiving system and method. Sharp Laboratories of America, David C Ripma, Matthew D Rabdau, July 4, 2000: US06085104 (28 worldwide citation)

A wideband receiver, including a time-varying finite impulse response (FIR) filter, has been provided to combine multipath communications of data in response to pilot channel timing information. The time-varying FIR processes the multipath communications through independent signal paths. Each signal ...


3
Srinivas Kandala: Devices, methods and software for centralized session planning while in a DCF mode. Sharp Laboratories of America, Marger Johnson & McCollom P C, May 23, 2006: US07050459 (28 worldwide citation)

Devices, softwares and methods for centralized session planning while in a DCF mode. An access point plans centrally a schedule of individual sessions with each station. Then it announces to each peripheral station the onset of the session by a polling pulse that includes the return address of a MAC ...


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Srinivas Kandala: Devices, softwares and methods for rescheduling multi-party sessions upon premature termination of session. Sharp Laboratories of America, Stolowitz Ford Cowger, February 12, 2008: US07330877 (22 worldwide citation)

Devices, softwares and methods reschedule multi-party sessions upon premature termination of a wireless communication session. Upon sensing a premature termination, an access point transmits a rescheduling frame. All sessions are advanced in time, which saves time in the end, without leaving quiet t ...


6
Srinivas Kandala: System and method for synchronizing an IEEE 802.11 power-save interval. Sharp Laboratories of America, Law Office of Gerald Maliszewski, Gerald Maliszewski, May 13, 2008: US07372855 (20 worldwide citation)

A system and method are provided for coordinating a power-save interval in an IEEE 802.11 wireless network. The method transmits a first frame from an access point (AP) to a quality of service station (QSTA) and receives an acknowledgement from the QSTA. In response to receiving the acknowledgement, ...


7
Srinivas Kandala, V Srinivasa Somayazulu, Chan K Park: Method of hybrid soft/hard decision demodulation of signals with multilevel modulation. Sharp Laboratories of America, Chernoff Vilhauer McClung & Stenzel, December 20, 2005: US06977972 (15 worldwide citation)

The performance of forward error correction decoders for digital communication systems can be improved if soft information relating the reliability of the value representing the demodulated signal is provided to the decoder with a value for the signal. On the other hand, soft information increases t ...


8
Srinivas Kandala, V Srinivasa Somayazulu, John M Kowalski, Hirohiko Yamamoto: Wideband frequency tracking system and method. Sharp Laboratories of America, David C Ripma, Matthew D Rabdau, Scott C Krieger, September 11, 2001: US06289061 (14 worldwide citation)

A wideband receiver automatic frequency control (AFC) system which combines multipath or diverse antenna signals, before the carrier frequency error is determined, is provided herein. Rather than independently calculating the frequency error of each transmission path, frequency error is calculated a ...


9
V Srinivasa Somayazulu, Srinivas Kandala, John M Kowalski, Chan K Park: Extension of wireless local area network communication system to accommodate higher data rates while preserving legacy receiver features. Sharp Laboratories of America, Chernoff Vilhauer McClung & Stenzel, April 19, 2005: US06882679 (13 worldwide citation)

In a direct sequence spread spectrum data communication system an information bit is mixed with a pseudorandom noise or spreading code to produce modulated codeword for transmission. A method of bandwidth efficient M-ary phase shift key modulation encoding at least 16 bits of data to a single codewo ...


10
Srinivas Kandala: Data unit detection including antenna diversity. SHARP Laboratories of America, Chernoff Vilhauer McClung & Stenzel, January 7, 2003: US06505037 (9 worldwide citation)

A system adjusts a receiving device in response to sensing symbols. An automatic gain control is adjusted in response receiving a first symbol of a data unit from a first antenna. After adjusting the automatic gain control at least a second and a third symbol of the data unit are received, and in re ...