Systems and methods for suppressing interference in a wireless communication system
First Claim
1. A method comprising:
- receiving, through each receive antenna of m receive antennas of a receiving device, a training signal set transmitted from each transmit antenna of n transmit antennas of a first transmitting device that is a source of interference, whereinm and n are each greater than 1,the training signal set is included in a null data packet (NDP) sounding packet,the NDP sounding packet has a preamble that includesa field selected from a legacy short training field (L-STF), a legacy long training field (L-LTF) and a legacy signal field (LSIG), anda very high throughput long training field (VHTLTF) for each transmit antenna and a signaling field indicating the number of VHTLTEs;
determining, from the training signal set, a channel estimate for a communication channel between the first transmitting device and the receiving device, wherein the channel estimate includes m-by-n description of the communication channel based on the data for each transmit antenna of the n transmit antennas;
receiving, by the receiving device, a data signal from a second transmitting device; and
filtering, based on the determined channel estimate, the data signal to suppress interference injected b the first transmitting device in the data signal transmitted by the second transmitting device.
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Accused Products
Abstract
Receiving devices and methods for suppressing interference from a data signal received at a receiving device are provided. The receiving device has m receive antennas. A training signal set transmitted from a first transmitting device is received at the receiving device. The training signal set includes (i) data for each transmit antenna of n transmit antennas included on the first transmitting device and (ii) information sufficient to determine a channel estimate corresponding to a communication channel between the first transmitting device and the receiving device. The channel estimate is determined based on the training signal set. The channel estimate includes an m-by-n description of the communication channel. The data signal received at the receiving device is filtered based on the channel estimate to suppress the interference in the data signal. The data signal is transmitted from a second transmitting device different from the first transmitting device.
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Citations
20 Claims
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1. A method comprising:
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receiving, through each receive antenna of m receive antennas of a receiving device, a training signal set transmitted from each transmit antenna of n transmit antennas of a first transmitting device that is a source of interference, wherein m and n are each greater than 1, the training signal set is included in a null data packet (NDP) sounding packet, the NDP sounding packet has a preamble that includes a field selected from a legacy short training field (L-STF), a legacy long training field (L-LTF) and a legacy signal field (LSIG), and a very high throughput long training field (VHTLTF) for each transmit antenna and a signaling field indicating the number of VHTLTEs; determining, from the training signal set, a channel estimate for a communication channel between the first transmitting device and the receiving device, wherein the channel estimate includes m-by-n description of the communication channel based on the data for each transmit antenna of the n transmit antennas; receiving, by the receiving device, a data signal from a second transmitting device; and filtering, based on the determined channel estimate, the data signal to suppress interference injected b the first transmitting device in the data signal transmitted by the second transmitting device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A receiving device comprising:
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m receive antennas, each configured to receive a training signal set transmitted from each transmit antenna of n transmit antennas of a first transmitting device that is a source of interference, and further configured to receive a data signal from a second transmitting device, wherein m and n are each greater than 1, the training signal set is included in a null data packet (NDP) sounding packet, the NDP sounding packet has a preamble that includes a field selected from a legacy short training field (L-STF), a legacy long training field (L-LTF) and a legacy signal field (LSIG), and a very high throughput long training field (VHTLTF) for each transmit antenna and a signaling field indicating the number of VHTLTFs; and a channel estimation block configured to determine, from the training signal set, a channel estimate for a communication channel between the first transmitting device and the receiving device, wherein the channel estimate includes an m-by-n description of the communication channel based on the data for each transmit antenna of the n transmit antennas; and a filter configured to filter, based on the determined channel estimate, the data signal to suppress interference injected by the first transmitting device in the data signal transmitted by the second transmitting device. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
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20. A method comprising:
transmitting, by a transmitting device, a training signal set from each transmit antenna of n transmit antennas of the transmitting device, to each receive antenna of m receive antennas of a receiving device, wherein m and n are each greater than 1, the training signal set is included in a null data packet (NDP) sounding packet, the NDP sounding packet does not include a data portion, the NDP sounding packet has a preamble that includes a field selected from a legacy short training field (L-STF), a legacy long training field (L-LTF) and a legacy signal field (LSIG), a very high throughput long training fields (VHTLTF) for each transmit antenna and a signaling field indicating the number of VHTLTFs, and an NDP announcement frame that contains media access control (MAC) information for the first transmitting device.
Specification