Pulse or digital communications – Synchronizers – Frequency or phase control using synchronizing signal
Reexamination Certificate
2005-02-09
2009-02-10
Liu, Shuwang (Department: 2611)
Pulse or digital communications
Synchronizers
Frequency or phase control using synchronizing signal
C375S134000, C375S135000, C375S136000, C375S137000, C375S145000, C375S146000, C375S147000, C375S246000, C375S253000, C375S342000, C375S365000, C375S366000, C375S367000, C375S370000, C375S265000
Reexamination Certificate
active
07489755
ABSTRACT:
Various embodiments are described to provide for the transmission and reception of data in an improved manner. Data transmission is improved by including in a transmitter a null generator (110) to generate an output data symbol sequence that exhibits nulls in the frequency domain at particular frequencies that an input data symbol sequence does not. A pilot inserter (120) then adds a pilot symbol sequence to this output data symbol sequence to create a combined symbol sequence. Since the pilot symbol sequence exhibits pilot signals corresponding to the nulls of the output data symbol sequence in the frequency domain, the combined symbol sequence exhibits pilots that are orthogonal to the data in the frequency domain.
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Ghosh Amitava
Sankaran Chandrasekar
Tan Jun
Wang Fan
Liu Shuwang
Motorola Inc.
Timory Kabir A
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