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Chihming Ming Chen

from Arcadia, CA
Age ~46

Chihming Chen Phones & Addresses

  • Arcadia, CA
  • Rowland Heights, CA
  • Berkeley, CA
  • Fremont, CA
  • Corona, CA
  • Spanaway, WA
  • Puyallup, WA
  • Kent, WA
  • Rowland Heights, CA

Publications

Us Patents

Viterbi Decoder Utilizing Compressed Survival Metrics For Reduced Memory Size Requirements

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US Patent:
7382831, Jun 3, 2008
Filed:
May 6, 2004
Appl. No.:
10/839351
Inventors:
Chihming (Norman) Chen - Cupertino CA, US
Howard Hicks - La Jolla CA, US
Assignee:
Advanced Micro Devices, Inc. - Sunnyvale CA
International Classification:
H04L 5/12
H04L 23/02
US Classification:
375262, 375341, 714795, 714796
Abstract:
A Viterbi decoder is configured for subtracting each survivor metric for each corresponding encoder state by a prescribed subtraction operator based on a prescribed event. The subtraction of each survivor metric by a prescribed subtraction operator based on a prescribed event minimizes memory requirements in the accumulated metric table by limiting the survivor metric values to a identifiable range. Hence, the Viterbi decoder can be implemented in an economical manner with reduced memory requirements.

Residual Frequency Error Estimation In An Ofdm Receiver

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US Patent:
20050122895, Jun 9, 2005
Filed:
Dec 5, 2003
Appl. No.:
10/727670
Inventors:
Xu Zhou - Sunnyvale CA, US
Chihming Chen - Fremont CA, US
Chih Hsueh - Cupertino CA, US
Orlando Canelones - Pflugerville TX, US
International Classification:
H04J011/00
US Classification:
370210000
Abstract:
An OFDM receiver configured for measuring frequency error based on comparing prescribed pilot tones from a prescribed group of consecutive symbols in a received OFDM signal. A complex conjugate generator is configured for generating complex conjugates of the prescribed pilot tones of a first subgroup of the consecutive symbols. A multiplier is configured for generating a complex pilot product, for each symbol subgroup position, by multiplying the pilot tones of a second subgroup symbol at the corresponding symbol subgroup position with the respective complex conjugates of the first subgroup symbol at the corresponding symbol subgroup position. A complex summation circuit sums the complex pilot products of the symbol subgroup positions to obtain an accumulated complex value. A error calculator calculates the frequency error from the accumulated complex value for use in correcting frequency offset.
Chihming Ming Chen from Arcadia, CA, age ~46 Get Report