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US 2017/0288913 A1Published application
Wireless Telecommunications System For High-Mobility Applications
AssigneeCohere Technologies, Inc.
InventorsShlomo Rakib, Ron Hadani
Life of this patent
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Abstract
A wireless telecommunications system that mitigates infra-symbol interference due to Doppler-shift and multipath. Embodiments of the present invention are particularly advantageous for wireless telecommunications systems that operate in high-mobility environments, including high-speed trains and airplanes.
Claims20
A process comprising:
- receiving a first data item and a second data item;
- generating a waveform φ1(m1,n1) of waveform array Φ1 wherein:
- (i) the waveform φ1(m1,n1) is partitioned into N1 time slots 1, . . . , p1, . . . , N1, and
- (ii) time slot p1 of the waveform φ1(m1,n1) comprises a basic waveform b1(m1) multiplied by exp[2π(n1−1)(p1−1)i/N1], and
- (iii) the waveform φ1(m1,n1) is multiplied by the first data item, and
- (iv) M1 and N1 are positive integers greater than 1, and
- (v) m1 is a positive integer in the range m1ε{1, . . . , M1}, and
- (vi) n1 and p1 are positive integers in the range n1, p1ε{1, . . . , N1};
- generating a waveform φ2(m2,n2) of waveform array Φ2 wherein:
- (i) the waveform φ2(m2,n2) is partitioned into N2 time slots 1, . . . , p2, . . . , N2, and
- (ii) time slot p2 of the waveform φ2(m2,n2) comprises a basic waveform b2(m2) multiplied by exp[2π(n2−1)(p2−1)i/N2], and
- (iii) the waveform φ2(m2,n2) is multiplied by the second data item, and
- (iv) M2 and N2 are positive integers greater than 1, and
- (v) m2 is a positive integer in the range m2ε{1, . . . , M2}, and
- (vi) n2 and p2 are positive integers in the range n2, p2ε{1, . . . , N2};
- modulating a radio-frequency carrier signal with the sum of the waveform φ1(m1,n1) and the waveform φ2(m2,n2) to generate a modulated radio-frequency carrier signal;
- and
- radiating the modulated radio-frequency carrier signal into a radio channel via an antenna;
- wherein M1≠M2;
- and
- wherein the waveform φ1(m1,n1) and the waveform φ2(m2,n2) overlap in time in the modulated radio-frequency carrier signal.
18 more elements
A process comprising:
- receiving a first data item and a second data item;
- generating a waveform φ1(m1,n1) of waveform array Φ1 wherein:
- (i) the waveform φ1(m1,n1) is partitioned into N1 time slots 1, . . . , p1, . . . , N1, and
- (ii) time slot p1 of the waveform φ1(m1,n1) comprises a basic waveform b1(m1) multiplied by exp[2π(n1−1)(p1−1)i/N1], and
- (iii) the waveform φ1(m1,n1) is multiplied by the first data item, and
- (iv) M1 and N1 are positive integers greater than 1, and
- (v) m1 is a positive integer in the range m1ε{1, . . . , M1}, and
- (vi) n1 and p1 are positive integers in the range n1, p1ε{1, . . . , N1};
- generating a waveform φ2(m2,n2) of waveform array Φ2 wherein:
- (i) the waveform φ2(m2,n2) is partitioned into N2 time slots 1, . . . , p2, . . . , N2, and
- (ii) time slot p2 of the waveform φ2(m2,n2) comprises a basic waveform b2(m2) multiplied by exp[2π(n2−1)(p2−1)i/N2], and
- (iii) the waveform φ2(m2,n2) is multiplied by the second data item, and
- (iv) M2 and N2 are positive integers greater than 1, and
- (v) m2 is a positive integer in the range m2ε{1, . . . , M2}, and
- (vi) n2 and p2 are positive integers in the range n2, p2ε{1, . . . , N2};
- modulating a radio-frequency carrier signal with the sum of the waveform φ1(m1,n1) and the waveform φ2(m2,n2) to generate a modulated radio-frequency carrier signal;
- and
- radiating the modulated radio-frequency carrier signal into a radio channel via an antenna;
- wherein N1≠N2;
- and
- wherein the waveform φ1(m1,n1) and the waveform φ2(m2,n2) overlap in time in the modulated radio-frequency carrier signal.
18 more elements
Dependencies are inferred from the claim text.