Table of Contents
Advertisement
Quick Links
Advertisement
Table of Contents
Related Manuals for decaWave DW1000
Summary of Contents for decaWave DW1000
- Page 1 APH010 DW1000 INTER- CHANNEL INTERFERENCE How transmissions on one DW1000 channel can affect other channels and how to minimize that effect Version 1.2 This document is subject to change without notice © 2024 Qorvo, US, Inc. – All Rights Reserved...
-
Page 2: Table Of Contents
............... 5 RANSMISSION ECEPTION ON DIFFERENT CHANNELS & G ......................7 ONCLUSIONS UIDELINES INTER CHANNEL INTERFERENCE IN THE DW1000 ..............9 ........................... 9 VERVIEW .................. 9 SIGNAL INTERFERENCE BETWEEN CHANNELS ......................10 ESULTING INTERFERENCE EFFECT OF USING DIFFERENT PRF AND PREAMBLE CODES ON THE SAME CHANNEL FOR TRANSMIT &... - Page 3 APH010 DW1000 INTER-CHANNEL INTERFERENCE 9: E 3 ........19 ABLE FFECT OF REAMBLE CODE ON INTERFERENCE FROM HANNEL HANNEL 10: E 1 ......... 20 ABLE FFECT OF PREAMBLE CODE ON INTERFERENCE FROM HANNEL HANNEL 11: E 3 ......... 20 ABLE...
-
Page 4: Introduction
APH010 DW1000 INTER-CHANNEL INTERFERENCE NTRODUCTION The DW10000 can be configured to operate on one of 6 RF channels with centre frequencies from 3.5 GHz to 6.5 GHz. It uses the modulation scheme and messaging format as defined by the IEEE802.15.4-2011 UWB standard shown in Figure 1 below. -
Page 5: Summary Results And Conclusions
APH010 DW1000 INTER-CHANNEL INTERFERENCE UMMARY RESULTS AND CONCLUSIONS 2.1 Introduction This section presents summary results from the various investigations detailed later in this note as well as conclusions and guidelines to minimize inter and intra-channel interference. 2.2 Methodology The methodology used in testing for interference between a transmitter and a victim receiver was to introduce and increase the level of attenuation between the transmitter and the victim receiver until the victim receiver was unaffected by the transmissions. -
Page 6: Table 1: Summary Of Inter-Channel Interference Using The Same Prf And Preamble Code
APH010 DW1000 INTER-CHANNEL INTERFERENCE -30dBm -40dBm -50dBm -60dBm -70dBm -80dBm TX CH1 -90dBm RX CH2 1GHz 2GHz 3GHz 4GHz 5GHz 6GHz 7GHz Figure 2: Tx Channel 1 / Rx Channel 2 -30dBm -40dBm -50dBm -60dBm -70dBm -80dBm TX CH1 -90dBm... -
Page 7: Conclusions & Guidelines
• It is possible to modify the power spectrum of the transmitter by using a band-pass filter between the DW1000 and the antenna centred on the channel centre-frequency of interest and with a steep cut-off at the band edges. •... - Page 8 APH010 DW1000 INTER-CHANNEL INTERFERENCE • Table 13 , with all channels configured for 64 MHz PRF, by choosing appropriate preamble codes the inter-channel interference can be reduced to the point where the interfering transmitter must be within approximately 1 m of the victim receiver for inter-channel interference to become a problem.
-
Page 9: Inter Channel Interference In The Dw1000
This means that lower channels interfere more strongly with higher frequency ones than vice versa. Note that it is possible to configure the DW1000 transmitter to generate side lobes of lower energy, but such a configuration will consume more current. The transmitter configurations used for the measurements presented in this document are the optimal settings as given in the DW1000 User Manual. -
Page 10: Resulting Interference
APH010 DW1000 INTER-CHANNEL INTERFERENCE The combination of this transmitter PSD with the receiver response for various channel frequencies is shown in Figure 5 to Figure 20 below. These diagrams are for illustration purposes only and are based on a zero-loss channel. In reality the transmit spectrum at the receiver will be at a lower level due to attenuation in the channel. - Page 11 APH010 DW1000 INTER-CHANNEL INTERFERENCE -30dBm -30dBm -40dBm -40dBm -50dBm -50dBm -60dBm -60dBm -70dBm -70dBm -80dBm -80dBm TX CH1 TX CH2 -90dBm -90dBm RX CH1 RX CH2 1GHz 2GHz 3GHz 4GHz 5GHz 6GHz 7GHz 1GHz 2GHz 3GHz 4GHz 5GHz 6GHz 7GHz...
-
Page 12: Figure 9: T Xchannel 1 / R
APH010 DW1000 INTER-CHANNEL INTERFERENCE -30dBm -30dBm -40dBm -40dBm -50dBm -50dBm -60dBm -60dBm -70dBm -70dBm -80dBm -80dBm TX CH1 TX CH1 -90dBm -90dBm RX CH2 RX CH3 1GHz 2GHz 3GHz 4GHz 5GHz 6GHz 7GHz 1GHz 2GHz 3GHz 4GHz 5GHz 6GHz 7GHz... -
Page 13: Figure 13: T Xchannel 2 / R
APH010 DW1000 INTER-CHANNEL INTERFERENCE -30dBm -30dBm -40dBm -40dBm -50dBm -50dBm -60dBm -60dBm -70dBm -70dBm -80dBm -80dBm TX CH2 TX CH2 -90dBm -90dBm RX CH3 RX CH5 1GHz 2GHz 3GHz 4GHz 5GHz 6GHz 7GHz 1GHz 2GHz 3GHz 4GHz 5GHz 6GHz 7GHz... -
Page 14: Figure 17: T Xchannel 3 / R
APH010 DW1000 INTER-CHANNEL INTERFERENCE -30dBm -30dBm -40dBm -40dBm -50dBm -50dBm -60dBm -60dBm -70dBm -70dBm -80dBm -80dBm TX CH5 TX CH3 -90dBm -90dBm RX CH2 RX CH5 1GHz 2GHz 3GHz 4GHz 5GHz 6GHz 7GHz 8GHz 1GHz 2GHz 3GHz 4GHz 5GHz 6GHz... -
Page 15: Effect Of Using Different Prf And Preamble Codes On The Same Channel For Transmit & Receive
APH010 DW1000 INTER-CHANNEL INTERFERENCE FFECT OF USING DIFFERENT AND PREAMBLE CODES ON THE SAME & CHANNEL FOR TRANSMIT RECEIVE 4.1 Introduction In order to analyse the level of inter-channel interference suggested in the preceding plots it is first useful to examine the effects of using different values of PRF and preamble code when the transmitter and receiver are configured for the same channel. -
Page 16: Table 3: Effect Of Prf / Preamble Code On Channel 1
APH010 DW1000 INTER-CHANNEL INTERFERENCE Table 3: Effect of PRF / Preamble code on Channel 1 TRANSMIT CH1 / RECEIVE CH1 AT 64 MHz PRF AT 16 MHz PRF RESULTING PICKUP RADIUS 45 m 72 m = 3.5 GHz RECEIVE on CHANNEL 1... -
Page 17: Table 6: Effect Of Prf / Preamble Code On Channel 5
APH010 DW1000 INTER-CHANNEL INTERFERENCE TRANSMIT CH3 / RECEIVE CH3 AT 64 MHz PRF AT 16 MHz PRF RESULTING PICKUP RADIUS 45 m 76 m = 4.5 GHz RECEIVE ON CHANNEL 3 centre 64 MHz 16 MHz Preamble code 40 m... -
Page 18: Interference Between Different Channels When Using Different Prf And Preamble Codes
APH010 DW1000 INTER-CHANNEL INTERFERENCE NTERFERENCE BETWEEN DIFFERENT CHANNELS WHEN USING DIFFERENT AND PREAMBLE CODES 5.1 Introduction To begin with, a summary of the inter-channel interference and its pickup radius when using the same PRF and preamble code is shown in Table 7. -
Page 19: Table 9: Effect Of Preamble Code On Interference From Channel 1 To Channel 3
APH010 DW1000 INTER-CHANNEL INTERFERENCE Table 8: Effect of Preamble code on interference from Channel 1 to Channel 2 TRANSMIT CH1 / RECEIVE CH2 AT 64 MHz PRF AT 16 MHz PRF RESULTING PICKUP RADIUS 16 m = 4 GHz RECEIVE ON CHANNEL 2... -
Page 20: Table 10: Effect Of Preamble Code On Interference From Channel 2 To Channel 1
APH010 DW1000 INTER-CHANNEL INTERFERENCE Table 10: Effect of preamble code on interference from Channel 2 to Channel 1 TRANSMIT CH2 / RECEIVE CH1 AT 64 MHz PRF AT 16 MHz PRF RESULTING PICKUP RADIUS 9.7 m 20 m = 3.5 GHz... -
Page 21: Table 12: Effect Of Preamble Code On Interference From Channel 3 To Channel 2
APH010 DW1000 INTER-CHANNEL INTERFERENCE Table 12: Effect of preamble code on interference from Channel 3 to Channel 2 TRANSMIT CH3 / RECEIVE CH2 AT 64 MHz PRF AT 16 MHz PRF RESULTING PICKUP RADIUS 15 m = 4 GHz RECEIVE ON CHANNEL 2... -
Page 22: Conclusions And Guidelines For Channel Configuration
It is possible to modify the power spectrum of the transmitter by using a band-pass filter between the DW1000 and the antenna centred on the channel centre-frequency of interest and with a steep cut-off at the band edges. This minimizes the energy in the transmitted side-lobes and reduces the problem at source. - Page 23 APH010 DW1000 INTER-CHANNEL INTERFERENCE • Table , with all channels configured for 64 MHz PRF, by choosing appropriate preamble codes the inter-channel interference can be reduced to the point where the interfering transmitter must be within approximately 1 m of the victim receiver for inter-channel interference to become a problem.
-
Page 24: Table 13: Summary Of Inter-Channel Interference Using Different Preamble Codes At 64Mhz Prf
APH010 DW1000 INTER-CHANNEL INTERFERENCE Table 13: Summary of inter-channel interference using different preamble codes at 64MHz PRF Legend Explanation Desired Desired operation; e.g. transmit on channel 1, receive on channel 1 No interference Interference will occur when range between Transmitter and Receiver is less than x.y <... -
Page 25: Major Changes
APH010 DW1000 INTER-CHANNEL INTERFERENCE AJOR HANGES HANGE ESCRIPTION EW LOGO AND TEMPLATE “F ” EW SECTION FOR URTHER NFORMATION RONT PAGE EW REVISION HANGE ESCRIPTION ODIFICATION TO FOOTER © 2024 Qorvo, US, Inc. – All Rights Reserved Page 25 of 28... -
Page 26: Document History
APH010 DW1000 INTER-CHANNEL INTERFERENCE OCUMENT ISTORY Table 14: Document History Revision Date Description Initial release Update, details unavailable 08/08/18 Updates for new logo and template. And added these revision tables. 14/05/24 Scheduled update © 2024 Qorvo, US, Inc. – All Rights Reserved... -
Page 27: Further Information
Decawave’s technology enables an entirely new class of easy to implement, highly secure, intelligent location functionality and services for IoT and smart consumer products and applications. For further information on this or any other Decawave product, please refer to our website www.decawave.com. © 2024 Qorvo, US, Inc. – All Rights Reserved... -
Page 28: Appendix 1: Test Methodology
10.1.2 Actual Interference testing Using the previously calibrated test rig, for each configuration of transmitter and receiver, a number of packets are transmitted. DecaWave’s “DecaRanging” tool is used to indicate the number of transmitted packets, received packets and various error counts.
Need help?
Do you have a question about the DW1000 and is the answer not in the manual?
Questions and answers