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Ultra-wideband positioning TOA (time of arrival) estimation method and circuit assembly

An ultra-broadband and pulsed ultra-broadband technology, applied in the field of ultra-broadband wireless communication, which can solve problems such as processing performance limitations and low-rate wireless communication

Active Publication Date: 2013-05-22
李冀
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The pulse system UWB transmits information through the baseband pulse sequence, which has the advantages of simple system structure, low cost, low power consumption, etc., and has a wide range of applications in the fields of wireless communication, ranging, detection, etc. Detection, energy detection, analog correlation detection and other methods, whose processing performance is limited by analog processing, generally can only achieve low-speed wireless communication and detection, positioning and other functions

Method used

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  • Ultra-wideband positioning TOA (time of arrival) estimation method and circuit assembly
  • Ultra-wideband positioning TOA (time of arrival) estimation method and circuit assembly
  • Ultra-wideband positioning TOA (time of arrival) estimation method and circuit assembly

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Embodiment

[0032] figure 1 For the flow chart (receiver block diagram) of the TOA estimation method of ultra-wideband positioning, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings:

[0033] In the ultra-wideband impulse radio system, the ultra-wideband positioning TOA estimation method based on incoherent energy detection is implemented by taking the pulsed ultra-wideband combined with OOK modulation as an example.

[0034] The emission signal can be expressed as:

[0035] (1)

[0036] S(t) is a pulse sequence composed of single-cycle pulse p(t), and j is the number of transmitted pulses. T s is the pulse repetition period.

[0037] The channel adopts CM1 channel of IEEE 802.15.4a channel.

[0038] The received signal through the channel is expressed as:

[0039] (2)

[0040] h(t) is the channel impulse response, n(t) is additive noise.

[0041...

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Abstract

The invention discloses an ultra-wideband positioning TOA (time of arrival) estimation method which includes the steps: A, triggering received pulse ultra-wideband signals to generate rectangular pulse signals after energy integration; B, generating RC (resistance-capacitance) charge-discharge waveform signals from the rectangular pulse signals by an RC integral circuit; C, digitalizing the outputted RC charge-discharge waveform signals by an A / D (analog to digital) converter; D, performing TOA coarse estimation and processing digital signals outputted by the A / D converter to obtain an estimated position of initial charge time of the RC circuit; and E, performing TOA fine estimation to obtain accurate initial charge time of the RC circuit according to the relationship between charge voltage and charge time, namely, to obtain accurate TOA estimation. The invention further relates to a circuit assembly implementing the ultra-wideband positioning TOA estimation method.

Description

technical field [0001] The invention belongs to the technical field of ultra-wideband wireless communication, and in particular relates to an ultra-wideband first-arrival pulse arrival time estimation method. Background technique [0002] Ultrawideband (UWB) technology is a new type of wireless communication technology that uses spectrum resources in a stacked manner. It has received extensive attention in recent years, and its transmission signal bandwidth can be as high as several gigahertz (GHz). UWB technology can generally be divided into two basic implementations of the pulse system and the carrier system. The pulse system UWB transmits information through the baseband pulse sequence, which has the advantages of simple system structure, low cost, low power consumption, etc., and has a wide range of applications in the fields of wireless communication, ranging, detection, etc. The processing performance of methods such as detection, energy detection, and analog correla...

Claims

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Application Information

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IPC IPC(8): H04W64/00H04B1/7163H04B17/00H04B17/382
Inventor 李冀
Owner 李冀
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