Systems/methods of transmitting information via baseband waveforms comprising frequency content agility and an orthogonality therebetween
DCFirst Claim
1. A communications method comprising:
- forming at baseband a desired spectrum shape;
thengenerating at baseband a waveform responsive to the desired spectrum shape; and
thentransmitting and/or receiving information by transmitting and/or receiving at a transmitter and/or at a receiver a plurality of elements of the waveform sequentially one after another via a single carrier frequency;
wherein said generating at baseband a waveform responsive to the desired spectrum shape comprises;
generating at baseband a discrete time-domain waveform U(nT) without resorting to chipping with a binary waveform;
wherein n denotes a discrete time index of U(nT);
n=1, 2, . . . , N;
NT≦
τ
;
τ
denotes a time span of the discrete time-domain waveform U(nT); and
T>
0;
wherein said transmitting and/or receiving information by transmitting and/or receiving at a transmitter and/or at a receiver a plurality of elements of the waveform sequentially one after another via a single carrier frequency comprises;
transmitting and/or receiving elements of U(nT) sequentially via the single carrier frequency by transmitting and/or receiving U(T) via the single carrier frequency, followed by transmitting and/or receiving U(2T) via the single carrier frequency, . . . , followed by transmitting and/or receiving U(NT) via the single carrier frequency; and
wherein said forming at baseband a desired spectrum shape comprises;
processing at baseband devoid of chipping with a binary waveform;
using at baseband a first plurality of frequencies to form the desired spectrum shape over a first time interval; and
using at baseband a second plurality of frequencies to form the desired spectrum shape over a second time interval;
wherein the first plurality of frequencies differs from the second plurality of frequencies in at least one frequency.
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Abstract
Communications systems and/or methods are disclosed that may be used to convey information by forming, and then using, a plurality of frequency agile baseband waveforms, wherein any two different waveforms of the plurality of frequency agile baseband waveforms comprise an orthogonality therebetween. The systems/methods disclosed can convey information by mapping an information sequence into a baseband waveform sequence that includes waveforms of the plurality of baseband waveforms, and by transmitting the baseband waveform sequence. Such systems and/or methods can provide extreme privacy, cognitive radio capability, robustness to fading and interference, communications performance associated with M-ary orthonormal signaling and/or high multiple-access capacity.
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Citations
73 Claims
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1. A communications method comprising:
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forming at baseband a desired spectrum shape;
thengenerating at baseband a waveform responsive to the desired spectrum shape; and
thentransmitting and/or receiving information by transmitting and/or receiving at a transmitter and/or at a receiver a plurality of elements of the waveform sequentially one after another via a single carrier frequency; wherein said generating at baseband a waveform responsive to the desired spectrum shape comprises; generating at baseband a discrete time-domain waveform U(nT) without resorting to chipping with a binary waveform; wherein n denotes a discrete time index of U(nT);
n=1, 2, . . . , N;
NT≦
τ
;
τ
denotes a time span of the discrete time-domain waveform U(nT); and
T>
0;wherein said transmitting and/or receiving information by transmitting and/or receiving at a transmitter and/or at a receiver a plurality of elements of the waveform sequentially one after another via a single carrier frequency comprises; transmitting and/or receiving elements of U(nT) sequentially via the single carrier frequency by transmitting and/or receiving U(T) via the single carrier frequency, followed by transmitting and/or receiving U(2T) via the single carrier frequency, . . . , followed by transmitting and/or receiving U(NT) via the single carrier frequency; and wherein said forming at baseband a desired spectrum shape comprises; processing at baseband devoid of chipping with a binary waveform; using at baseband a first plurality of frequencies to form the desired spectrum shape over a first time interval; and using at baseband a second plurality of frequencies to form the desired spectrum shape over a second time interval; wherein the first plurality of frequencies differs from the second plurality of frequencies in at least one frequency. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A communications method comprising:
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forming at baseband a desired spectrum shape to include at least one frequency that provides a frequency content to a waveform and to also include at least one frequency that is excluded from providing a frequency content to the waveform;
thengenerating at baseband the waveform responsive to the desired spectrum shape; and
thentransmitting and/or receiving information by transmitting and/or receiving at a transmitter and/or at a receiver a plurality of elements of the waveform sequentially one after another via a single carrier frequency; wherein said generating at baseband the waveform responsive to the desired spectrum shape comprises; generating a discrete time-domain waveform U(nT) without resorting to chipping with a binary waveform; wherein n denotes a discrete time index of U(nT);
n=1, 2, . . . , N;
NT≦
τ
;
τ
denotes a time span of the discrete time-domain waveform U(nT); and
T>
0;wherein said transmitting and/or receiving information by transmitting and/or receiving at a transmitter and/or at a receiver a plurality of elements of the waveform sequentially one after another via a single carrier frequency comprises; transmitting and/or receiving elements of U(nT) sequentially via the single carrier frequency by transmitting and/or receiving U(T) via the single carrier frequency, followed by transmitting and/or receiving U(2T) via the single carrier frequency, . . . , followed by transmitting and/or receiving U(NT) via the single carrier frequency; and wherein said forming at baseband a desired spectrum shape comprises; processing at baseband devoid of chipping with a binary waveform; using at baseband a first plurality of frequencies to form the desired spectrum shape over a first time interval; and using at baseband a second plurality of frequencies to form the desired spectrum shape over a second time interval; wherein the first plurality of frequencies differs from the second plurality of frequencies in at least one frequency. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. A communications system comprising:
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a processor that is configured to form at baseband a desired spectrum shape and to generate at baseband a waveform responsive to the desired spectrum shape; and a transmitter and/or receiver that is/are configured to transmit and/or receive information by transmitting and/or receiving a plurality of elements of the waveform sequentially one after another via a single carrier frequency; wherein the waveform comprises a discrete time-domain waveform U(nT);
n denotes a discrete time index of U(nT);
n=1, 2, . . . , N;
NT≦
τ
;
τ
denotes a time span of the discrete time-domain waveform U(nT); and
T>
0;wherein the transmitter and/or receiver is/are further configured to transmit and/or receive elements of U(nT) sequentially via the single carrier frequency by transmitting and/or receiving U(T) via the single carrier frequency, followed by transmitting and/or receiving U(2T) via the single carrier frequency, . . . , followed by transmitting and/or receiving U(NT) via the single carrier frequency; and wherein the processor is configured to form at baseband the desired spectrum shape, without resorting to chipping with a binary waveform, to include; a first plurality of frequencies over a first time interval; and a second plurality of frequencies over a second time interval; wherein the first plurality of frequencies differs from the second plurality of frequencies in at least one frequency. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31, 32, 33)
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34. A communications system comprising:
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a processor that is configured to form at baseband a desired spectrum shape, without resorting to chipping with a binary waveform, comprising at least one frequency that provides a frequency content to a waveform and at least one frequency that is excluded from providing a frequency content to the waveform; and
to generate the waveform at baseband responsive to the desired spectrum shape by generating a discrete time-domain waveform U(nT);
wherein n denotes a discrete time index of U(nT);
n=1, 2, . . . , N;
NT≦
τ
;
τ
denotes a time span of the discrete time-domain waveform U(nT); and
T>
0; anda transmitter and/or receiver that is/are configured to transmit and/or receive information by transmitting and/or receiving a plurality of elements of the waveform sequentially one after another via a single carrier frequency by transmitting and/or receiving U(T) via the single carrier frequency, followed by transmitting and/or receiving U(2T) via the single carrier frequency, . . . , followed by transmitting and/or receiving U(NT) via the single carrier frequency; wherein the processor is further configured to form at baseband the desired spectrum shape to include; a first plurality of frequencies over a first time interval; and a second plurality of frequencies over a second time interval; wherein the first plurality of frequencies differs from the second plurality of frequencies in at least one frequency. - View Dependent Claims (35, 36, 37, 38, 39, 40, 41, 42, 43, 44)
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45. A communications method comprising:
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selecting a frequency interval over which a waveform U(nT) is to exist;
wherein n denotes a discrete time index and wherein n=1, 2, . . . , N;
T>
0;allowing at least one frequency that is included in the selected frequency interval to provide a frequency content to the waveform U(nT); excluding at least one frequency that is included in the selected frequency interval from providing a frequency content to the waveform U(nT); forming at baseband the waveform U(nT) comprising a plurality of elements U(T), U(2T), . . . , U(NT), corresponding to respective integer values 1, 2, . . . , N of the discrete time index n; and transmitting and/or receiving information by transmitting and/or receiving at a transmitter and/or at a receiver, the plurality of elements U(T), U(2T), . . . , U(NT) of the waveform U(nT) sequentially one after another via a single carrier frequency by first transmitting and/or receiving U(T) via the single carrier frequency, followed by transmitting and/or receiving U(2T) via the single carrier frequency, . . . , followed by transmitting and/or receiving U(NT) via the single carrier frequency; wherein said forming at baseband the waveform U(nT) is devoid of chipping with a binary waveform and further comprises; generating at baseband a first waveform using a first plurality of frequencies over a first time interval; and generating at baseband a second waveform using a second plurality of frequencies over a second time interval; wherein the second plurality of frequencies differs from the first plurality of frequencies in at least one frequency. - View Dependent Claims (46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57)
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58. A communications system comprising:
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a processor that is configured to select a frequency interval over which a waveform U(nT) is to exist, wherein n denotes a discrete time index and wherein n=1, 2, . . . , N;
T>
0;
to allow at least one frequency that is included in the selected frequency interval to provide a frequency content to the waveform U(nT);
to exclude at least one frequency that is included in the selected frequency interval from providing a frequency content to the waveform U(nT) and to form at baseband the waveform U(nT) comprising a plurality of elements U(T), U(2T), . . . , U(NT), corresponding to respective integer values 1, 2, . . . , N of the discrete time index n; anda transmitter and/or receiver that is/are configured to transmit and/or receive information by transmitting and/or receiving the plurality of elements U(T), U(2T), . . . , U(NT) of the waveform U(nT) sequentially one after another via a single carrier frequency by first transmitting and/or receiving U(T) via the single carrier frequency, followed by transmitting and/or receiving U(2T) via the single carrier frequency, . . . , followed by transmitting and/or receiving U(NT) via the single carrier frequency; wherein the processor is devoid of chipping with a binary waveform and is further configured to; generate at baseband a first waveform using a first plurality of frequencies over a first time interval; and generate at baseband a second waveform using a second plurality of frequencies over a second time interval; wherein the second plurality of frequencies differs from the first plurality of frequencies in at least one frequency. - View Dependent Claims (59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73)
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Specification