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SIR measuring method and device for WCDMA uplink (backward) link

A measurement method and reverse technology, applied in the transmission system, selection device, code division multiplexing system, etc., can solve the problems of inaccurate SIR measurement, insufficient sample size, channel estimation error, etc., to reduce errors, The effect of improving measurement accuracy and avoiding secondary introduction

Inactive Publication Date: 2004-09-22
INST OF TELECOMM TRANSMISSION MINIST OF INFORMATION IND +2
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AI Technical Summary

Problems solved by technology

After carefully analyzing the algorithm point by point, it is found that the SIR measurement is inaccurate because the algorithm expands the error caused by the channel estimation.
Generally, it is theoretically considered that the ideal channel estimation uses the overall statistical characteristics of multiple access interference plus background noise, but under the fast closed-loop power control mechanism, an inner-loop SIR measurement value is required for each time slot, which makes the actual The capacity of the samples taken for channel estimation is not large enough (up to 2560 chips); moreover, the current 3GPP protocol stipulates that the number of pilot symbols of the uplink control channel is 3, 4, 5, 6, 7, 8, which can be used for inner ring SIR measurement Smaller sample sizes will inevitably lead to channel estimation errors

Method used

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  • SIR measuring method and device for WCDMA uplink (backward) link
  • SIR measuring method and device for WCDMA uplink (backward) link
  • SIR measuring method and device for WCDMA uplink (backward) link

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Embodiment Construction

[0027] Figure 5 depicts how Figure 4 The specific structure of the single-path SIR measurement module (E1).

[0028] Among them, the single-path instantaneous signal power measuring device (E1.1) includes: multiplier I (E1.11), N pilot Sign integral averager I (E1.12), complex modulo device I (E1.13), squarer I (E1.14), the multipliers I and N pilot The sign integral averager I, the complex modulo finding device I, and the squarer I are sequentially connected in series.

[0029] The single-path instantaneous multiple access interference and background noise power measurer (E1.2) includes: subtractor (E1.21), complex modulo device II (E1.22), squarer II (E1.23), N pilot Signed integral meaner II (E1.24), said subtractor and complex modulo means II, squarer II, N pilot The sign integral averager II is serially connected in sequence.

[0030] Noise averager (E1.3) includes: multiplier II (E1.31), multiplier III (E1.32), adder (E1.33), delayer (E1.34) said multiplier II, The...

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Abstract

A SIR measuring method for the internal-loop SIR measurement in the power control of up link for WCDMA communication system includes measuring the SIR of the signal from each path and summing the measured SIR values of all pathes. Its advantages are use of single-path measuring modules, simple algorithm, and high precision.

Description

(1) Technical field: [0001] The invention relates to a method and device for measuring SIR of an uplink (reverse) link in a WCDMA (wideband code division multiple access) system, and a reverse closed-loop power control based thereon. (two) background technology: [0002] In November 1999, the International Telecommunications Union (ITU) passed the proposed standard of the third generation mobile communication system IMT-2000 wireless transmission department. The system is a real broadband mobile multimedia communication system, which can realize high-quality broadband multimedia integrated services, global seamless coverage, global roaming, and meet the requirements for information exchange at any time, anywhere and in any way. Among the proposed standards that adopt CDMA technology, the most important ones are the IMT-DS standard based on the WCDMA standard proposed by Europe and Japan and the IMT-DS standard based on the CDMA2000 standard proposed by North America. MC sta...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W24/08H04B7/005H04B17/00H04B17/336H04W52/14H04W52/24
Inventor 郗风君全庆一张平
Owner INST OF TELECOMM TRANSMISSION MINIST OF INFORMATION IND
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