Pulse or digital communications – Systems using alternating or pulsating current – Plural channels for transmission of a single pulse train
Reexamination Certificate
2001-07-27
2004-06-15
Chin, Stephen (Department: 2634)
Pulse or digital communications
Systems using alternating or pulsating current
Plural channels for transmission of a single pulse train
C375S347000, C375S349000, C370S286000, C370S287000, C455S059000, C455S273000, C455S276100, C455S277100, C455S303000, C329S320000, C329S353000
Reexamination Certificate
active
06751264
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates generally to receivers and more specifically to radio receivers.
RELATED ART
Multiple sensors such as antennas are typically used to provide more information to a receiver. However, the multiple sensors generally receive a superposition of differently delayed and attenuated versions of a transmitted signal due at least in part to unintentional reflections and scattering. The multipath components received from the transmitted signals typically have different phases that may constructively or destructively add together, thereby causing the fading of the received signals. Therefore, a need exists for an improved receiver to effectively combine or process these received signals from multiple sensors. Furthermore, a need exists to reduce the effects of multipath echo and increase the reliability level of these receivers.
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John R. Treichler et al., “A New Approach to Multipath Correction of Constant Modulus Signals”, 1983 IEEE Transactions On Acoustics, Speech, and Signal Processing, vol. ASSP-31, No. 2, 14 pgs.
Ho Yui-Luen
Inayatullah Azfar
Li Junsong
Chin Stephen
Chiu Joanna G.
Ha Dac V.
Hill Susan C.
Motorola Inc.
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