Wireless data communication method via ultra-wide band encoded data signals, and receiver device for implementing the same
First Claim
1. A wireless data communication method between a transmitter device having a first wide band antenna for transmitting ultra wide band coded data signals, and a receiver device having a second wide band antenna for receiving direct path and multiple path coded data signals, wherein the method comprises the steps of:
- (a) defining transmitted data by one or more sequences of N pulses where N is an integer number higher than 1, wherein the arrangement of N pulses of each sequence represents encoding of data relating to the transmitter device;
(b) the receiver device receiving the N pulses of one pulse sequence of direct path and multiple path coded data signals, wherein the N pulses are each processed in one of N corresponding reception time windows, wherein each of the N reception time windows is positioned in time as a function of a known theoretical arrangement of the N pulses of the signals transmitted by the transmitter device; and
(c) carrying out, in the receiver device, an operation of adding the N windows in a coherent manner before data demodulation so that added pulse amplitude level is higher than noise amplitude level captured by the receiver device;
(d) performing an operation of adding the N time windows before or after analogue-digital conversion of the analogue signals, and wherein the analogue signal pulses are sampled in the analogue-digital conversion stage by at least one sampling signal supplied by a signal processing unit, wherein the sampling signal has a frequency proportional to a frequency of a clock signal; and
(e) calculating several absolute value maximum amplitude values for signals in time sub-windows of defined length TN, wherein each of the sub-windows is time shifted in relation to each other by a determined time interval from the start of the reception time window to the end of said time window.
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Abstract
This invention concerns a wireless data communication method, wherein a transmitter device having a first wide band antenna transmits ultra-wide band coded data signals to a receiver device having a second wide band antenna for receiving the direct and/or multiple path coded data signals. The transmitted data is defined by one or several sequences of N pulses where N is an integer number greater than 1. The arrangement of the N pulses of each sequence represents a data coding relative to the transmitter device. The N pulses of a sequence of direct and/or multiple path coded data signals received by the receiver device are processed each in one among N corresponding reception time windows. Each of the N reception time windows is positioned in time based on a known theoretic arrangement of the N pulses of signals transmitted by the transmitter device. An adding operation of the N windows is then performed in the receiver device so that the amplitude level of the constantly added pulses is higher than the amplitude level of the noise sensed by the receiver device.
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Citations
20 Claims
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1. A wireless data communication method between a transmitter device having a first wide band antenna for transmitting ultra wide band coded data signals, and a receiver device having a second wide band antenna for receiving direct path and multiple path coded data signals, wherein the method comprises the steps of:
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(a) defining transmitted data by one or more sequences of N pulses where N is an integer number higher than 1, wherein the arrangement of N pulses of each sequence represents encoding of data relating to the transmitter device; (b) the receiver device receiving the N pulses of one pulse sequence of direct path and multiple path coded data signals, wherein the N pulses are each processed in one of N corresponding reception time windows, wherein each of the N reception time windows is positioned in time as a function of a known theoretical arrangement of the N pulses of the signals transmitted by the transmitter device; and (c) carrying out, in the receiver device, an operation of adding the N windows in a coherent manner before data demodulation so that added pulse amplitude level is higher than noise amplitude level captured by the receiver device; (d) performing an operation of adding the N time windows before or after analogue-digital conversion of the analogue signals, and wherein the analogue signal pulses are sampled in the analogue-digital conversion stage by at least one sampling signal supplied by a signal processing unit, wherein the sampling signal has a frequency proportional to a frequency of a clock signal; and (e) calculating several absolute value maximum amplitude values for signals in time sub-windows of defined length TN, wherein each of the sub-windows is time shifted in relation to each other by a determined time interval from the start of the reception time window to the end of said time window. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A wireless data communication method between a transmitter device having a first wide band antenna for transmitting ultra wide band coded data signals, and a receiver device having a second wide band antenna for receiving direct path and multiple path coded data signals, wherein the method comprises the steps of:
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(a) defining transmitted data by one or more sequences of N pulses where N is an integer number higher than 1, wherein the arrangement of N pulses of each sequence represents encoding of data relating to the transmitter device; (b) the receiver device receiving the N pulses of one pulse sequence of direct path and multiple path coded data signals, wherein the N pulses are each processed in one of N corresponding reception time windows, wherein each of the N reception time windows is positioned in time as a function of a known theoretical arrangement of the N pulses of the signals transmitted by the transmitter device; and (c) carrying out, in the receiver device, an operation of adding the N windows so that added pulse amplitude level is higher than noise amplitude level captured by the receiver device, wherein the receiver device further comprises a second signal processing unit that includes means for adding the digital windows and means for estimating the time of arrival of the coded data signals, wherein before or after the time window addition operation is carried out, the method further includes the steps of (d) calculating several absolute value maximum amplitude values for signals in time sub-windows of defined length TN, wherein each of the sub-windows is time shifted in relation to each other by a determined time interval from the start of the reception time window to the end of said time window; and (e) estimating a noise amplitude level by selecting the minimum amplitude value from all the calculated amplitude values.
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19. A wireless data communication method between a transmitter device having a first wide band antenna for transmitting ultra wide band coded data signals, and a receiver device having a second wide band antenna for receiving direct path and multiple path coded data signals, wherein the method comprises the steps of:
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(a) defining transmitted data by one or more sequences of N pulses where N is an integer number higher than 1, wherein the arrangement of N pulses of each sequence represents encoding of data relating to the transmitter device; (b) the receiver device receiving the N pulses of one pulse sequence of direct path and multiple path coded data signals, wherein the N pulses are each processed in one of N corresponding reception time windows, wherein each of the N reception time windows is positioned in time as a function of a known theoretical arrangement of the N pulses of the signals transmitted by the transmitter device; and (c) carrying out, in the receiver device, an operation of adding the N windows in a coherent manner before data demodulation so that added pulse amplitude level is higher than noise amplitude level captured by the receiver device, wherein the transmitter device includes i. a first oscillator stage delivering at least one first clock signal at a first defined frequency; ii. a first signal processing unit clocked by the clock signal provided by the first oscillator stage in order to modulate the data to be transmitted; and iii. a unit for shaping the N pulses of each sequence to be transmitted by the first wide band antenna of the transmitter device as a function of the data modulation provided by the first signal processing unit; and wherein the receiver device includes i. a second oscillator stage delivering at least one second clock signal at a second defined frequency; ii. a second signal processing unit connected to the second oscillator stage; and iii. an analogue-digital conversion stage for analogue signals relating to the coded data signals received by the second wide band antenna; and (d) calculating several absolute value maximum amplitude values for signals in time sub-windows or defined length TN, wherein each of the sub-windows is time shifted in relation to each other by a determined time interval from the start of the reception time window to the end of said time window.
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20. A wireless data communication method between a transmitter device having a first wide band antenna for transmitting ultra wide band coded data signals, and a receiver device having a second wide band antenna for receiving direct path and multiple path coded data signals, wherein the method comprises the steps of:
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(a) defining transmitted data by one or more sequences of N pulses where N is an integer number higher than 1, wherein the arrangement of N pulses of each sequence represents encoding of data relating to the transmitter device; (b) the receiver device receiving the N pulses of one pulse sequence of direct path and multiple path coded data signals, wherein the N pulses are each processed in one of N corresponding reception time windows, wherein each of the N reception time windows is positioned in time as a function of a known theoretical arrangement of the N pulses of the signals transmitted by the transmitter device; and (c) carrying out, in the receiver device, an operation of adding the N windows in a coherent manner before data demodulation so that added pulse amplitude level is higher than noise amplitude level captured by the receiver device, wherein the transmitter device includes i. a first oscillator stage delivering at least one first clock signal at a first defined frequency; ii. a first signal processing unit clocked by the clock signal provided by the first oscillator stage in order to modulate the data to be transmitted; and iii. a unit for shaping the N pulses of each sequence to be transmitted by the first wide band antenna of the transmitter device as a function of the data modulation provided by the first signal processing unit; and wherein the receiver device includes i. a second oscillator stage delivering at least one second clock signal at a second defined frequency; ii. a second signal processing unit connected to the second oscillator stage; and iii. an analogue-digital conversion stage for analogue signals relating to the coded data signals received by the second wide band antenna, wherein the method further comprises the steps of; (d) performing an operation of adding the N time windows before or after analogue-digital conversion of the analogue signals, and wherein the analogue signal pulses are sampled in the analogue-digital conversion stage by at least one sampling signal supplied by the second signal processing unit, wherein the sampling signal has a frequency proportional to the second frequency of the second clock signal; and (e) calculating several absolute value maximum amplitude values for signals in time sub-windows of defined length TN, wherein each of the sub-windows is time shifted in relation to each other by a determined time interval from the start of the reception time window to the end of said time window.
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Specification