Sept 2011 doc IEEE 802 15 11 0673

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Sept. 2011 doc. : IEEE 802. 15 -11 -0673 -00 -0006 Project: IEEE P

Sept. 2011 doc. : IEEE 802. 15 -11 -0673 -00 -0006 Project: IEEE P 802. 15 Working Group for Wireless Personal Area Networks (WPANs) Submission Title: [Proposed resolution for CID 160] Date Submitted: [21 July, 2011] Source: Mi-Kyung Oh, Jae-Hwan Kim, Hyung-Soo Lee and Sangsung Choi (ETRI) Seung-Hoon Park (Samsung Electronics) Voice: +82 42 860 5680, FAX: +82 42 860 5218, E-Mail: [email protected] re. kr Re: [802. 15. TG 6] Abstract: This contribution is prepared to resolve CID 160 Purpose: Notice: This document has been prepared to assist the IEEE P 802. 15. 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 802. 15. Submission Slide 1 Mi-Kyung Oh (ETRI)

Sept. 2011 doc. : IEEE 802. 15 -11 -0673 -00 -0006 CID 160 •

Sept. 2011 doc. : IEEE 802. 15 -11 -0673 -00 -0006 CID 160 • Comment – PPM modulation, i. e. , 1 bit mapped to 0 or 1, is much easier to implement than the GPPM modulation, where 4 bits are mapped to 8 bits and the mapping is non-linear, which means a more complex decoder. Because of the increased complexity of GPPM modulation scheme, the PPM modulation scheme should be made mandatory. • Proposed Change – Rewrite the sentence as follows: Km = 1 shall be the default value (mandatory mode), while Km = 0 is an optional mode that may be used if both devices support that option. Submission Slide 2 Mi-Kyung Oh (ETRI)

Sept. 2011 doc. : IEEE 802. 15 -11 -0673 -00 -0006 CID 160 •

Sept. 2011 doc. : IEEE 802. 15 -11 -0673 -00 -0006 CID 160 • Resolution Status: Rejected • Resolution Detail – The half rate coded-OOK (on-off modulation) modulation performs better than simple 2 PPM. The increment in complexity is marginal. In the Annex B 2 Soft Detection, shows a simple algorithm for detection, which has been implemented in software and hardware. 2 PPM was introduced as optional modulation for very simple nonmedical applications. As this PHY aims medical applications mainly, half rate coded-OOK is the mandatory modulation Submission Slide 3 Mi-Kyung Oh (ETRI)

Sept. 2011 doc. : IEEE 802. 15 -11 -0673 -00 -0006 Further Discussion •

Sept. 2011 doc. : IEEE 802. 15 -11 -0673 -00 -0006 Further Discussion • Complexity issue – The GPPM-related logic occupation would be much less than 1% within UWB PHY modem design. The complexity of UWB PHY modem mainly comes from synchronization block and channel decoder. In our implementation experience, the GPPM-related logic occupied just 0. 4% of total modem size with 6 -bit soft precision. If the hard decision based demodulator is used, the demodulator logic occupation would be further deceased. Therefore, considering medical applications, half rate coded-OOK is the mandatory modulation for better performance. Submission Slide 4 Mi-Kyung Oh (ETRI)

Sept. 2011 doc. : IEEE 802. 15 -11 -0673 -00 -0006 Further Discussion •

Sept. 2011 doc. : IEEE 802. 15 -11 -0673 -00 -0006 Further Discussion • Low-complexity demodulation of GPPM (doc. 15 -09 -0322 -01) Submission Slide 5 Mi-Kyung Oh (ETRI)