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Dive into the research topics where Tak K. Lee is active.

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Featured researches published by Tak K. Lee.


international symposium on information theory | 2007

A Flexible Memory-Mapping Scheme for Parallel Turbo Decoders with Periodic Interleavers

Tak K. Lee; Ba-zhong Shen

Almost regular permutation (ARP) and quadratic permutation polynomials (QPP) are two common types of interleavers for parallel turbo decoding. However, for a turbo decoder using such an interleaver, previous memory-mapping schemes are applicable only if, P, the number of processors used, divides L, the interleaver length, and P satisfies various other constraints. In this paper, we introduce a novel memory-mapping scheme that removes these restrictions and allows the user more flexibility in determining the numbers of processors to be used, at the expense of some overhead.


Archive | 2007

Overlapping sub-matrix based ldpc (low density parity check) decoder

Hau Thien Tran; Kelly Brian Cameron; Ba-Zhong Shen; Tak K. Lee


Archive | 2005

LDPC (Low Density Parity Check) coding and interleaving implemented in MIMO communication systems

Ba-Zhong Shen; Christopher J. Hansen; Joseph Paul Lauer; Kelly Brian Cameron; Tak K. Lee; Hau Thien Tran


Archive | 2004

Multi-dimensional space Gray code maps for multi-dimensional phase modulation as applied to LDPC (Low Density Parity Check) coded modulation

Ba-Zhong Shen; Tak K. Lee; Kelly Brian Cameron; Hau Thien Tran


Archive | 2009

Quasi-cyclic LDPC (low density parity check) code construction

Ba-Zhong Shen; Tak K. Lee


Archive | 2011

LDPC (Low Density Parity Check) codes with corresponding parity check matrices selectively constructed with CSI (Cyclic Shifted Identity) and null sub-matrices

Ba-Zhong Shen; Hau Thien Tran; Tak K. Lee; Kelly Brian Cameron


Archive | 2012

Flexible rate matching

Ba-Zhong Shen; Sirikiat Lek Ariyavisitakul; Mark Kent; Tak K. Lee; Kelly Brian Cameron


Archive | 2006

LDPC (Low Density Parity Check) code size adjustment by shortening and puncturing

Ba-Zhong Shen; Tak K. Lee; Kelly Brian Cameron


Archive | 2006

Sub-matrix-based implementation of LDPC (Low Density Parity Check) decoder

Tak K. Lee; Hau Thien Tran; Ba-Zhong Shen; Kelly Brian Cameron


Archive | 2002

All digital reference frequency locking

Bruce J. Currivan; Ravi Bhaskaran; Thomas J. Kolze; Kevin Lee Miller; Jeffrey S. Putnam; Fang Lu; Tak K. Lee; Thuji Simon Lin; Loke Kun Tan; Gopal Venkatesan; Hsin-An Liu; Jonathan S. Min; James P. Cavallo

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