System and method for reducing pilot signal contamination using orthogonal pilot signals
First Claim
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1. A method for transmitting a pilot signal, comprising:
- generating the pilot signal at a transmitting unit;
modulating the pilot signal using quantum level overlay modulation to apply at least one orthogonal function to the pilot signal, wherein the modulated pilot signal is mutually orthogonal in both time and frequency domains, further wherein the modulated pilot signal minimizes time-frequency resources;
transmitting the modulated pilot signal from the transmitting unit to a receiving unit over a pilot channel; and
wherein the at least one orthogonal function applied to the pilot signal substantially reduces pilot channel contamination on the pilot channel from other pilot channels.
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Abstract
A system for transmitting pilot signals has first signal processing circuitry for generating a pilot signal at a transmitting unit. An MLO modulation circuit modulates the pilot signal using quantum level overlay modulation to apply at least one orthogonal function to the pilot signal. A transceiver transmits the modulated pilot signal from the transmitting unit over a pilot channel. The at least one orthogonal function applied to the pilot signal substantially reduces pilot channel contamination on the pilot channel from other pilot channels.
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Citations
27 Claims
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1. A method for transmitting a pilot signal, comprising:
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generating the pilot signal at a transmitting unit; modulating the pilot signal using quantum level overlay modulation to apply at least one orthogonal function to the pilot signal, wherein the modulated pilot signal is mutually orthogonal in both time and frequency domains, further wherein the modulated pilot signal minimizes time-frequency resources; transmitting the modulated pilot signal from the transmitting unit to a receiving unit over a pilot channel; and wherein the at least one orthogonal function applied to the pilot signal substantially reduces pilot channel contamination on the pilot channel from other pilot channels. - View Dependent Claims (5, 6, 7, 8, 9)
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2. The method 1 further including the steps of:
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receiving the modulated pilot signal at the receiving unit over the pilot channel; demodulating the modulated pilot signal using quantum level overlay demodulation to remove the at least one orthogonal function from the pilot signal; and outputting the demodulated pilot signal. - View Dependent Claims (3, 4)
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10. The method for transmitting pilot signals within a MIMO transmission system, comprising:
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generating a plurality of pilot signals at a plurality of transmitting units; modulating each of the plurality of pilot signals using quantum level overlay modulation to apply at least one orthogonal function to the plurality of pilot signals, wherein the modulated pilot signals are mutually orthogonal in both time and frequency domains, further wherein the modulated plurality of pilot signal minimizes time-frequency resources; transmitting the modulated pilot signals from the plurality of transmitting units to a MIMO receiving unit including a plurality of receiving antennas over a plurality of pilot channels, each of the plurality of pilot channels interconnecting one of the plurality of transmitting units to one of the plurality of receiving antennas of the MIMO receiving unit; and wherein the at least one orthogonal function applied to the plurality of pilot signals substantially reduces pilot channel contamination between the plurality of pilot channels. - View Dependent Claims (13, 14, 15, 16, 17, 18)
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11. The method 10 further including the steps of:
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receiving the plurality of modulated pilot signals at the MIMO receiving unit over the plurality of pilot channels; demodulating the modulated plurality of pilot signals using quantum level overlay demodulation to remove the at least one orthogonal function from each of the plurality of pilot signals; and outputting the demodulated plurality of pilot signals. - View Dependent Claims (12)
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19. A system for transmitting pilot signals, comprising:
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first signal processing circuitry for generating a pilot signal at a transmitting unit; QLO modulation circuitry for modulating the pilot signal using quantum level overlay modulation to apply at least one orthogonal function to the pilot signal, wherein the modulated pilot signal is mutually orthogonal in both time and frequency domains, further wherein the modulated pilot signal minimizes time-frequency resources; a transceiver for transmitting the modulated pilot signal from the transmitting unit over a pilot channel; and wherein the at least one orthogonal function applied to the pilot signal substantially reduces pilot channel contamination on the pilot channel from other pilot channels. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27)
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Specification