Abstract: A parameterized interleaver design process is provided, which optimizes the design for interleavers of any size, and can be completely specified using only a few design parameters. According to the parameterized interleaver design process an interleaver ?(i) of a length N is generated. A number of subpermutation masks are defined, and a first intermediate interleaver permutation is partitioned into a number of subgroups, wherein the number of subgroups corresponds with the number of subpermutation masks. Each of the subgroups of the first intermediate interleaver permutation is partitioned into a number of further subgroups, and each of the subpermutation masks is applied to each of the further subgroups of a corresponding subgroup of the first intermediate interleaver permutation, resulting in a corresponding portion of a second intermediate interleaver permutation. The resulting interleaver ?(i) is generated based at least in part on the first and second intermediate interleaver permutations.
Type:
Grant
Filed:
July 31, 2013
Date of Patent:
December 3, 2013
Assignee:
Hughes Network System, LLC
Inventors:
Rohit Iyer Seshardri, Mustafa Eroz, Lin-Nan Lee
Abstract: A system and method for data transmissions in a wireless communications system, which accommodates for a periodic blockage of the transmission signal, is provided. A data stream is segmented into packets of a predetermined fixed-size for a burst-mode transmission over a channel of the communications system, wherein the transmission is subject to a periodic blockage. A forward error correction outer code is then applied to the packets of the data stream for recovery of packets subjected to the periodic blockage, and a unique word is added to each packet for acquisition of frequency, carrier phase and symbol timing of the respective packet. The packets of the data stream are interleaved based on an interleaver of a depth based at least in part on a ratio of a blockage free duration between two consecutive blockages of the periodic blockage to a duration of each blockage of the periodic blockage.
Type:
Application
Filed:
March 16, 2012
Publication date:
September 19, 2013
Applicant:
Hughes Network System, LLC
Inventors:
Lin-Nan Lee, Mustafa Eroz, Liping Chen, Satyajit Roy
Abstract: A method, system, and computer program product for providing communications services, including determining a type of communications service present in a communications session based on quality of service parameters assigned for the communications session; and adjusting the quality of service parameters based a different type of communications service requested. The types of communications services include real-time and non-real-time communications services.
Type:
Grant
Filed:
September 17, 2002
Date of Patent:
August 25, 2009
Assignee:
Hughes Network System, LLC
Inventors:
Channasandra Ravishankar, Abheek Saha, Saurabh Garg, Michael Darcy