Multipath communication methods and apparatuses
First Claim
1. A method comprising:
- identifying at least one multipath transmission delay within a reverse path data signal;
determining at least one forward path pre-equalization parameter based on said at least one transmission delay; and
modifying a forward path data signal based on said at least one forward path pre-equalization parameter.
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Accused Products
Abstract
Methods, apparatuses and systems are provided for identifying at least one multipath transmission delay within a reverse path data signal, determining at least one forward path pre-equalization parameter based on the transmission delay, and modifying a forward path data signal based on the forward path pre-equalization parameter. A reverse link transmission is used to help characterize the multipath delays that may exist between communicating devices. The reverse path data signal can include a training sequence or other like known/substantially-known data that can be analyzed to detect transmission delays, especially delays that extend beyond established guard intervals. Such pre-equalization techniques can be advantageously combined, for example, with antenna arrangements that support transmission diversity, spatial division transmission, and/or other like techniques.
105 Citations
95 Claims
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1. A method comprising:
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identifying at least one multipath transmission delay within a reverse path data signal;
determining at least one forward path pre-equalization parameter based on said at least one transmission delay; and
modifying a forward path data signal based on said at least one forward path pre-equalization parameter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42)
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43. A system comprising:
a first device operatively configurable to connect to at least a second device over a wireless communication path, said first device having logic that is configured to detect a multipath transmission delay in at least one reverse path data signal transmitted by said second device, determine at least one forward path pre-equalization parameter based on said detected multipath transmission delay, and pre-equalize a forward path data signal that is to be transmitted to said second device based on said at least one forward path pre-equalization parameter. - View Dependent Claims (44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81)
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82. An apparatus comprising:
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an Orthogonal Frequency Division Multiplexing (OFDM) processor configured to receive coded data and output corresponding OFDM data;
a pre-equalizer operatively coupled to said OFDM processor and configured to receive said OFDM data and output pre-equalized OFDM data based on gathered reverse link data;
at least one antenna; and
a transceiver operatively coupled to said pre-equalizer and said at least one antenna, said transceiver being configured to receive said pre-equalized OFDM data from said pre-equalizer and apply a corresponding transmittable forward link data signal to said at least one antenna. - View Dependent Claims (83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95)
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Specification