June 2005 doc:IEEE b Slide 1 Submission Liang Li, Vinno Inc. Project: IEEE P Working Group for Wireless Personal Area Networks (WPANs) Submission Title: [The Discussion on the RC Filter of Transmitter at 866MHz band ] Date Submitted: [June ] Source: [Liang Zhang, Hongyu Gu, Chenyang Yang, Liang Li,,Zhijian Hu] Company: [Vinno Inc.] Address: [2 Xinxi St, Building D, Haidian District, Beijing, China ] Voice:[ ], Re: [ IEEE b ] Abstract:[Discussion of RC filter of Transmitter on 868MHz band PHY.] Purpose:[To encourage discussion.] Notice:This document has been prepared to assist the IEEE P It is offered as a basis for discussion and is not binding on the contributing individual(s) or organization(s). The material in this document is subject to change in form and content after further study. The contributor(s) reserve(s) the right to add, amend or withdraw material contained herein. Release:The contributor acknowledges and accepts that this contribution becomes the property of IEEE and may be made publicly available by P

June 2005 doc:IEEE b Slide 2 Submission Liang Li, Vinno Inc. PSD(dB) raised cosine filter r=0.6 SUPPOSE: 1, 1.6MHz (4x)sampling rate; 2, 200kHz pass band; 3, Tx digital FIR filter; 4, 15 taps;

June 2005 doc:IEEE b Slide 3 Submission Liang Li, Vinno Inc. Impulse response of Tx filter – raised cosine filter r=0.6 SUPPOSE: 1, 1.6MHz (4x)sampling rate; 2, 200kHz pass band; 3, Tx digital FIR filter; 4, 15 taps;

June 2005 doc:IEEE b Slide 4 Submission Liang Li, Vinno Inc. 100kbps Data rate PSD with Tx filter 100kbps; 400k chip rate; 600k bandwidth; half sine pulse shape; 15 taps FIR Tx filter; Raised cosine filter with r=0.6; 4x over sampling rate; (1.6M sampling rate) 40ppm frequency offset is considered; Not Meet ETSI Mask

June 2005 doc:IEEE b Slide 5 Submission Liang Li, Vinno Inc. PSD(dB) raised cosine filter r=0.4 SUPPOSE: 1, 1.6MHz (4x)sampling rate; 2, 200kHz pass band; 3, Tx digital FIR filter; 4, 15 taps;

June 2005 doc:IEEE b Slide 6 Submission Liang Li, Vinno Inc. Impulse response of Tx filter – raised cosine filter r=0.4 SUPPOSE: 1, 1.6MHz (4x)sampling rate; 2, 200k Hz pass band; 3, Tx digital FIR filter; 4, 15 taps;

June 2005 doc:IEEE b Slide 7 Submission Liang Li, Vinno Inc. 100kbps Data rate PSD with Tx filter 100kbps; 400k chip rate; 600k bandwidth; half sine pulse shape; 15 taps FIR Tx filter; Raised cosine filter with r=0.4; 4x over sampling rate; (1.6M sampling rate) 40ppm frequency offset is considered Not Meet ETSI Mask

June 2005 doc:IEEE b Slide 8 Submission Liang Li, Vinno Inc. PSD(dB) raised cosine filter r=0.3 SUPPOSE: 1, 1.6MHz (4x)sampling rate; 2, 200kHz pass band; 3, Tx digital FIR filter; 4, 15 taps;

June 2005 doc:IEEE b Slide 9 Submission Liang Li, Vinno Inc. Impulse response of Tx filter – raised cosine filter r=0.3 SUPPOSE: 1, 1.6MHz (4x)sampling rate; 2, 200k Hz pass band; 3, Tx digital FIR filter; 4, 15 taps;

June 2005 doc:IEEE b Slide 10 Submission Liang Li, Vinno Inc. 100kbps Data rate PSD with Tx filter 100kbps; 400k chip rate; 600k bandwidth; half sine pulse shape; 15 taps FIR Tx filter; Raised cosine filter with r=0.3; 4x over sampling rate; (1.6M sampling rate) 40ppm frequency offset is considered; Meet ETSI Mask

June 2005 doc:IEEE b Slide 11 Submission Liang Li, Vinno Inc. PSD(dB) DSSS Signal – raised cosine filter r=0.2 SUPPOSE: 1, 1.6MHz (4x)sampling rate; 2, 200kHz pass band; 3, Tx digital FIR filter; 4,15 taps;

June 2005 doc:IEEE b Slide 12 Submission Liang Li, Vinno Inc. Time response of Tx filter – raised cosine filter r=0.2 SUPPOSE: 1, 1.6MHz (4x)sampling rate; 2, 250kHz pass band; 3, Tx digital FIR filter; 4, 15 taps;

June 2005 doc:IEEE b Slide 13 Submission Liang Li, Vinno Inc. 100kbps Data rate PSD with Tx filter 100kbps; 400k chip rate; 600k bandwidth; half sine pulse shape; 15 taps FIR Tx filter; Raised cosine filter with r=0.2; 4x over sampling rate; (1.6M sampling rate) 40ppm frequency offset is considered Meet ETSI Mask

June 2005 doc:IEEE b Slide 14 Submission Liang Li, Vinno Inc. Conclusion Within the +/-40 ppm frequency offset condition, with the RC filter (r<=0.3) at transmitter, the PSD of transmitted signals at 886 Mhz band is under the ETSI limitation.