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 response thereto (1) a first energy of at least one of the second and third symbols is calculated, (2) a first frequency offset of at least one of the second and third symbols is calculated, and (3) a first temporal offset of at least one of the second and third symbols is calculated. The automatic gain control in response receiving a fourth symbol of the data unit from a second antenna is received. After adjusting the automatic gain control at least a fifth and a sixth symbol of the data unit is calculated, and in response thereto (1) a second energy of at least one of the fifth and sixth symbols is calculated, (2) a second frequency offset of at least one of the fifth and sixth symbols is calculated, and (3) a second temporal offset of at least one of the fifth and sixth symbols is calculated. At least one of the first and second antenna is selected based upon a comparison between the first and second energy.
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 response thereto (1) a first energy of at least one of the second and third symbols is calculated, (2) a first frequency offset of at least one of the second and third symbols is calculated, and (3) a first temporal offset of at least one of the second and third symbols is calculated. The automatic gain control in response receiving a fourth symbol of the data unit from a second antenna is received. After adjusting the automatic gain control at least a fifth and a sixth symbol of the data unit is calculated, and in response thereto (1) a second energy of at least one of the fifth and sixth symbols is calculated, (2) a second frequency offset of at least one of the fifth and sixth symbols is calculated, and (3) a second temporal offset of at least one of the fifth and sixth symbols is calculated. At least one of the first and second antenna is selected based upon a comparison between the first and second energy.
Extension Of Wireless Local Area Network Communication System To Accommodate Higher Data Rates While Preserving Legacy Receiver Features
V. Srinivasa Somayazulu - Tigard OR, US Srinivas Kandala - Vancouver WA, US John M. Kowalski - Vancouver WA, US Chan K. Park - Glendale CA, US
Assignee:
Sharp Laboratories of America, Inc. - Camas WA
International Classification:
H04B001/69 H04B015/00 H04L027/20
US Classification:
375146, 375308, 375200
Abstract:
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 codeword is disclosed for extending the data rate of a spread spectrum system. Interoperability with legacy devices is maximized by maintaining structural similarity between the modulated waveforms of the extended data rate and legacy systems.
Devices, Methods And Software For Centralized Session Planning While In A Dcf Mode
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 layer of the station. The addressed peripheral device then transmits data from its MAC layer.
Devices, Softwares And Methods For Advancing Scheduling Of Next Contention Session Upon Premature Termination Of Contention Free Exchange
Devices, softwares and methods advance the scheduling of a next contention session upon premature termination of a contention free session. A Hybrid Coordinator detects when the exchange of wireless transmissions finishes before the contention free window is scheduled to end. Upon such detection, the Hybrid Coordinator transmits a notification to advance the scheduling of the next contention session. Upon sensing the notification, contention resumes by the participating peripherals.
System Clock Synchronization In An Ad Hoc And Infrastructure Wireless Networks
Srinivas Kandala - Vancouver WA, US John Michael Kowalski - Camas WA, US Richard Thomas Bennett - Vancouver WA, US
Assignee:
Sharp Laboratories of America, Inc. - Camas WA
International Classification:
H04Q 7/24
US Classification:
370349, 370350
Abstract:
A method of synchronizing clocks in the stations of ad hoc and infrastructure networks includes providing a time stamp field in a header; reading the header by all stations in a network; extracting the time stamp information from the header by each station in the network as time information; sending extracted time information to a station clock; and adjusting the station clock as a function of the extracted time information. A system for synchronizing clocks in the stations of ad hoc and infrastructure networks includes a DLL having a comparator for receiving the time stamp information and a low-pass filter having a long time-constant for adjusting the station clock in a gradual manner; a time stamp field in a header; and time information extracted from the time stamp information of the header by each station in the network.
Methods And Systems For Quality Of Service In Networks Comprising Wireless Devices
A system and method are provided for defining a Burst ACK interface in an IEEE 802. 11 network. The method comprising: using Burst ACK primitives to negotiate between peer station management entities (SMEs); establishing an interface between peer MAC entities associated with the SMEs; and, in response to negotiating with the Burst ACK primitives, using a Burst ACK protocol to communicate information between peer Quality of Service (QoS) stations (QSTAs) associated with the SMEs. Using a Burst ACK protocol to communicate information between peer QSTAs includes communicating between the peer MAC entities. In some aspects, establishing an interface between peer MAC entities includes each MAC entity: transceiving Burst ACK primitives with an associated SME; converting between Burst ACK primitives and physical layer communication MAC frames; and, transceiving communication physical layer MAC frames with a peer MAC entity, via the physical layer communication MAC frames.
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Kamala Sulochana by Kandala Srinivas Repalle
Kamala Sulochana Geetham on Violin played by Sri Kandala Srinivas, Sus...
Category:
Music
Uploaded:
23 Mar, 2011
Duration:
2m 57s
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Srinivas Kandala
Work:
Microsoft - Principal Test Manager INRIX - QA Engineering Manager (2005-2009) Intuit Inc. - DBA (1995-1997)
Education:
University of Washington - Information Management, University of Illinois at Chicago - Computer Science, Manipal Institute of Technology - Computer Engineering