METHOD FOR CHANNEL ESTIMATION IN A POINT-TO-POINT COMMUNICATION NETWORK.
First Claim
Patent Images
1. A method of using pilot signals in a wireless communication network comprising:
- encoding pilot signals; and
transmitting said encoded pilot signals over an in-band backhaul link between two nodes in the network.
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Abstract
A method of using pilot signals in a wireless communication network including encoding pilot signals, and transmitting the encoded pilot signals over an in-band backhaul link between two nodes in the network. Preferably, the pilot signals are encoded with a CDMA codeword associated with a link. The pilot signals can be decoded to permit estimation of a channel and interference attributable to each link.
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Citations
26 Claims
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1. A method of using pilot signals in a wireless communication network comprising:
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encoding pilot signals; and transmitting said encoded pilot signals over an in-band backhaul link between two nodes in the network. - View Dependent Claims (2, 3, 4, 5)
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6. A method for estimating a channel of a selected in-band backhaul link in a wireless communication network including a plurality of in-band backhaul links, the method comprising:
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allocating one of a family of CDMA codewords to each of said in-band backhaul links to identify said link; encoding a pilot transmission using said codeword; transmitting said encoded pilot transmission over the channel of the selected in-band link; receiving and decoding said encoded pilot transmission; estimating said channel using said pilot transmission and said decoded received pilot transmission. - View Dependent Claims (7, 8, 9, 10, 11)
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12. A method for channel estimation in a wireless communication network, having point-to-point backhaul over a channel between a first and second node forming a link, the method comprising:
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assigning at least one pilot value to said link; assigning a codeword from a family of CDMA codes to said link; encoding said pilot value in a transmitter of said first node using said assigned codeword; transmitting said encoded pilot value; decoding said transmitted pilot value in a receiver of said second node using said assigned codeword; and estimating the channel of said link by utilizing said pilot value, said codeword and said decoded pilot signal. What about the interference estimation?? - View Dependent Claims (13, 14)
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15. Apparatus for utilizing pilot signals in a wireless communication network, the apparatus comprising:
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an encoder for encoding pilot signals; and a transceiver for transmitting said encoded pilot signals over an in-band backhaul link between two nodes in the network. - View Dependent Claims (16, 17)
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18. Apparatus for channel estimation comprising:
a symbol builder in a transmitter, the symbol builder including; a multiplexer for multiplexing a codeword from a family of CDMA codes with a pilot value assigned to a link; and a tile physical mapper for mapping data symbols with said multiplexed coded pilot value onto an OFDMA frame. - View Dependent Claims (19, 20, 21, 22, 23)
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24. Apparatus for channel estimation for a wireless network including a plurality of nodes coupled for wireless communication in virtual clusters of nodes, each cluster including a feeder node coupled to a core network, a wireless link being formed between each pair of adjacent nodes, each node including at least one transceiver providing mobile access communication and in-band backhaul communication over the link;
- a modem coupled to each transceiver; and
a plurality of antennas mounted in the node, one coupled to each transceiver, the antennas being able to provide multiple concurrent transmissions over multiple antennas;
a controller in each node adapted and configured for control and coordination of the transceivers and associated modems, the apparatus comprising;elements in a transmitter for dividing a frame of OFDMA symbols into tiles, each tile including a group of time and frequency slices, a tile mapper for mapping CDMA-encoded pilot signals onto a selected number of such slots in each tile, and for mapping data signals onto the remaining slots in each tile, a decoder in said transceiver for decoding pilot signals received in said transceiver; and an accumulator for using said decoded pilot signals to estimate a channel over a link. - View Dependent Claims (25, 26)
- a modem coupled to each transceiver; and
Specification