Systems/methods of sequential modulation of a single carrier frequency by a plurality of elements of a waveform
DCFirst Claim
Patent Images
1. A communications method comprising:
- forming a desired spectrum shape for a waveform;
generating the waveform responsive to the desired spectrum shape; and
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;
wherein generating the waveform responsive to the desired spectrum shape comprises generating a discrete time-domain waveform U(nT);
wherein n denotes a discrete time index of U(nT);
wherein n=1, 2, . . . , N; and
NT≦
τ
;
wherein τ
denotes a time span of the discrete time-domain waveform U(nT);
wherein 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 the 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 a desired spectrum shape for a waveform further comprises;
using a first plurality of frequencies over a first time interval; and
using 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.
2 Assignments
Litigations
0 Petitions
Accused Products
Abstract
Systems and/or methods are disclosed for generating a waveform that comprises a plurality of elements by using a Fourier transform and/or an inverse Fourier transform. The waveform that comprises the plurality of elements may be transmitted by transmitting, sequentially in time, the plurality of elements. In some embodiments, the Fourier transform and/or inverse Fourier transform comprises a Fast Fourier Transform and/or Inverse Fast Fourier Transform and the waveform that comprises the plurality of elements may be transmitted by using, sequentially in time, the plurality of elements to modulate a single carrier frequency.
49 Citations
28 Claims
-
1. A communications method comprising:
-
forming a desired spectrum shape for a waveform; generating the waveform responsive to the desired spectrum shape; and 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; wherein generating the waveform responsive to the desired spectrum shape comprises generating a discrete time-domain waveform U(nT);
wherein n denotes a discrete time index of U(nT);
wherein n=1, 2, . . . , N; and
NT≦
τ
;
wherein τ
denotes a time span of the discrete time-domain waveform U(nT);wherein 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 the 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 a desired spectrum shape for a waveform further comprises; using a first plurality of frequencies over a first time interval; and using 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 (2, 3, 4, 5)
-
-
6. A communications method comprising:
-
forming a desired spectrum shape for a waveform to include at least one frequency that provides a frequency content to the waveform and at least one frequency that is excluded from providing a frequency content to the waveform; generating the waveform responsive to the desired spectrum shape; and 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; wherein generating the waveform responsive to the desired spectrum shape comprises generating a discrete time-domain waveform U(nT);
wherein n denotes a discrete time index of U(nT);
wherein n=1, 2, . . . , N; and
NT≦
τ
;
wherein τ
denotes a time span of the discrete time-domain waveform U(nT);wherein 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 the 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 a desired spectrum shape for a waveform further comprises; using a first plurality of frequencies over a first time interval; and using 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 (7, 8, 9, 10)
-
-
11. A communications system comprising:
-
a processor that is configured to form a desired spectrum shape for a waveform and to generate the 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);
wherein n denotes a discrete time index of U(nT);
wherein n=1, 2, . . . , N; and
NT≦
τ
;
wherein τ
denotes a time span of the discrete time-domain waveform U(nT);wherein the transmitter and/or receiver is/are further configured to transmit and/or receive the 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 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 (12, 13)
-
-
14. A communications system comprising:
-
a processor that is configured to form a desired spectrum shape for a waveform and to generate the 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 processor is configured to generate the waveform 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);
wherein n=1, 2, . . . , N; and
NT≦
τ
;
wherein τ
denotes a time span of the discrete time-domain waveform U(nT);wherein the transmitter and/or receiver 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 the 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; wherein the processor is configured to form the desired spectrum shape for the waveform to include; at least one frequency that provides a frequency content to the waveform; and at least one frequency that is excluded from providing a frequency content to the waveform; and wherein the processor is further configured to form 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 (15, 16)
-
-
17. A communications method comprising:
-
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;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 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 the waveform U(nT) further comprises; generating a first waveform using a first plurality of frequencies over a first time interval; and generating 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 (18, 19, 20, 21)
-
-
22. A communications system comprising:
-
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;
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 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 further configured to; generate a first waveform using a first plurality of frequencies over a first time interval; and generate 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 (23, 24, 25, 26, 27, 28)
-
Specification