Sub-banded ultra-wideband communication system
First Claim
Patent Images
1. A method for transmitting data using ultra-wideband techniques, said method comprising the steps of:
- (a) providing a transmitter subsystem configured to perform the steps of—
(a.1) providing a UWB channel as a series of UWB signal pulses,(a.2) dividing the UWB channel into N bands,(a.3) transmitting each pulse of said series through a band of said N divided bands, and(a.4) modulating said series of UWB pulses by selectively using at least one modulation technique from the group consisting of time/phase, frequency, and amplitude, said selection being based on sub-band channel conditions; and
(b) providing a receiver subsystem configured to perform the steps of—
(b.1) receiving a UWB signal divided into N bands,(b.2) combining the N bands into a UWB channel, and(b.3) deriving a series of UWB pulses from the combined N bands.
1 Assignment
0 Petitions
Accused Products
Abstract
A wireless communication system performs high-speed transmission of information signals by using a multi-band approach. Each band spans about 500MHz. A flexible modulation scheme within each band employs time, amplitude and phase modulations, allowing adaptation of the data rate to the sub-band conditions. In addition, pseudo-random frequency sequence is employed to provide sufficient multi-user interference reduction.
12 Citations
16 Claims
-
1. A method for transmitting data using ultra-wideband techniques, said method comprising the steps of:
-
(a) providing a transmitter subsystem configured to perform the steps of— (a.1) providing a UWB channel as a series of UWB signal pulses, (a.2) dividing the UWB channel into N bands, (a.3) transmitting each pulse of said series through a band of said N divided bands, and (a.4) modulating said series of UWB pulses by selectively using at least one modulation technique from the group consisting of time/phase, frequency, and amplitude, said selection being based on sub-band channel conditions; and (b) providing a receiver subsystem configured to perform the steps of— (b.1) receiving a UWB signal divided into N bands, (b.2) combining the N bands into a UWB channel, and (b.3) deriving a series of UWB pulses from the combined N bands. - View Dependent Claims (2, 3, 4, 5, 6)
-
-
7. A method for transmitting data using ultra-wideband techniques, said method comprising the steps of:
-
(a) providing a transmitter subsystem configured to perform the steps of— (a.1) providing a UWB channel as a series of UWB signal pulses, (a.2) dividing the UWB channel into N bands, (a.3) transmitting each pulse of said series through a band of said N divided bands, and (a.4) modulating said series of UWB pulses by selectively using at least one modulation technique from the group consisting of time/phase, frequency, and amplitude, said selection being based on sub-band channel conditions; and (b) providing a receiver subsystem configured to perform the steps of— (b.1) receiving a UWB signal divided into N bands, (b.2) combining the N bands into a UWB channel, and (b.3) deriving a series of UWB pulses from the combined N bands, wherein when N>
3, said transmitting step (a.3) optionally further comprises the step of;(a.3.3) skipping at least one in-between band of said N bands.
-
-
8. A method for transmitting data using ultra-wideband techniques, said method comprising the steps of:
-
(a) providing a transmitter subsystem configured to perform the steps of— (a.1) providing a UWB channel as a series of UWB signal pulses, (a.2) dividing the UWB channel into N bands, (a.3) transmitting each pulse of said series through a band of said N divided bands, (a.4) modulating said series of UWB pulses by selectively using at least one modulation technique from the group consisting of time/phase, frequency, and amplitude, said selection being based on sub-band channel conditions, (a.8) allocating data rate per band based on at least one of requirements of an application and capacity of a sub-channel, and (a.11) allocating a resource based on requirements of an application, wherein the resource is at least one of number of bands, modulations, symbol rate/band, raw bit rate, symbol interval, and inter-pulse separation; and (b) providing a receiver subsystem configured to perform the steps of— (b.1) receiving a UWB signal divided into N bands, (b.2) combining the N bands into a UWB channel, and (b.3) deriving a series of UWB pulses from the combined N bands. - View Dependent Claims (9, 10)
-
-
11. An apparatus for a multi-band ultra-wideband (UWB) communication system, comprising:
-
a transmitter subsystem comprising— a controller configured to divide a UWB channel into N bands, and to detect sub-band channel conditions, a modulator for modulating a series of UWB signal pulses to provide a sequence of modulated pulses, said modulator selectively modulating said series of UWB pulses using at least one modulation technique from the group consisting of time/phase, frequency, and amplitude, said selection being based on the detected sub-band channel conditions, and a transmitter configured transmits each modulated pulse through one of said N bands; and a receiver subsystem comprising— a receiver configured to receive UWB signals transmitted through said N bands, a controller configured to combine into a sequence of modulated pulses the signals received, and a demodulator configured to demodulate the sequence of modulated pulses. - View Dependent Claims (12, 13, 14)
-
-
15. An apparatus for a multi-band ultra-wideband (UWB) communication system, comprising:
-
a transmitter subsystem comprising— a controller configured to divide a UWB channel into N bands, a modulator for modulating a series of UWB signal pulses to provide a sequence of modulated pulses, and a transmitter configured transmits each modulated pulse through one of said N bands; and a receiver subsystem comprising— a receiver configured to receive UWB signals transmitted through said N bands, a controller configured to combine into a sequence of modulated pulses the signals received, and a demodulator configured to demodulate the sequence of modulated pulses, wherein the output of the transmitter is described by the equation
wherean and bn are an amplitude or phase modulating data, cn and dn are a differential time modulation data, f (n) is a frequency band component, τ
ch is a small time unit for channelization purposes or an additional channel to convey data,τ
is a small time unit for position modulation, andT is an inter-pulse separation. - View Dependent Claims (16)
-
Specification