Collision Free Row Column S-random Interleaver

Yılmaz, Ayşen
Parallel decodable turbo codes (PDTCs) are suitable for concurrent decoding and hence have low latency. Memory collision issue is an important problem met during parallel processing. In this article, we propose a collision free interleaver for parallel processing operations. The performance of PDTCs is analyzed with the proposed random interleaver preventing the memory collision problem. Distance spectra of PDTCs with the proposed interleaves are computed and compared to those with S-random interleaver.


Belief propagation decoding of polar codes under factor graph permutations
Peker, Ahmet Gökhan; Yücel, Melek Diker; Department of Electrical and Electronics Engineering (2018)
Polar codes, introduced by Arıkan, are linear block codes that can achieve the capacity of symmetric binary-input discrete memoryless channels with low encoding and decoding complexity. Polar codes of block length N are constructed by channel polarization method, which consists of channel combining and splitting operations to obtain N polarized subchannels from N copies of binary-input discrete memoryless channels. As N grows, symmetric channel capacities of the polarized subchannels converge to either 0 or...
Power-delay optimized VLSI threshold detection circuits and their use in parallel integer multiplication
Ercan, Furkan; Muhtaroğlu, Ali; Sustainable Environment and Energy Systems (2015-6)
Threshold detection is a fundamental logic function that has broad use in arithmetic processors, and other digital applications. Thus, any improvement in threshold detection in terms of power and/or delay contributes significantly to the field of digital circuit design. A recently reported parallel integer multiplier architecture, ABACUS, uses column compression networks to compress partial products through the final addition network. Architecture of column compression network of ABACUS is suitable for thre...
Dimension reduced robust beamforming for towed arrays
Topçu, Emre; Candan, Çağatay; Department of Electrical and Electronics Engineering (2015)
Adaptive beamforming methods are used to obtain higher signal to interference plus noise ratio at the array output. However, these methods are very sensitive to steering vector and covariance matrix estimation errors. To overcome this issue, robust methods are usually employed. On the other hand, implementation of these robust methods can be computationally expensive for arrays with large number of sensors. Reduced dimension techniques aim to lower the computational load of adaptive beamforming algorithms w...
Synchronization of linear systems via relative actuation
Tuna, Sezai Emre (Elsevier BV, 2019-12-01)
Synchronization in networks of discrete-time linear time-invariant systems is considered under relative actuation. Neither input nor output matrices are assumed to be commensurable. A distributed algorithm that ensures synchronization via dynamic relative output feedback is presented.
Wideband doa estimation for nonuniform linear arrays with wiener array interpolation
Yasar, T. Kaya; Tuncer, Temel Engin (2008-07-23)
Coherent wideband DOA estimation for non-uniform linear arrays (NLA) is considered. Array interpolation is used for two mappings. In the first mapping, NLA is mapped to a uniform linear array with the same array aperture. In the second mapping covariance matrices for each frequency bin are mapped to a single one at the center frequency for coherent DOA estimation. A Wiener formulation is used for array interpolation where both signal and noise powers are estimated with maximum likelihood method. Different a...
Citation Formats
O. GAZİ and A. Yılmaz, “Collision Free Row Column S-random Interleaver,” IEEE COMMUNICATIONS LETTERS, pp. 257–259, 2009, Accessed: 00, 2020. [Online]. Available: