Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs)

1. Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs) Submission Title: [Low-Cost Millimeter-Wave Self-Heterodyne Technique and Its Application] Date Submitted: [November 11, 2003] Source: [Yozo Shoji, Kiyoshi Hamaguchi, and Hiroyo Ogawa] Company [Communications Research Laboratory, Incorporated Administrative Agency] Address [3-4, Hikarino-Oka, Yokosuka, Kanagawa, 234-0051, Japan] Voice:[+81.46.847.5075], FAX: [+81.46.847.5079], E-Mail:[ y-shoji@crl.go.jp ] Abstract: [Description of new technology to reduce the creation cost of millimeter-wave systems.] Purpose: [Contribution to mmWIG at November 2003 meeting] Notice: This document has been prepared to assist the IEEE P802.15. 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 P802.15. Hiroyo Ogawa, CRL

2. Low-Cost Millimeter-Wave Self-Heterodyne Technique and Its Application Hiroyo Ogawa, CRL

3. Main Issues for Millimeter-Wave Systems Development • Creation of small inexpensive millimeter-wave devices • Creation of stable millimeter-wave oscillator to achieve frequency stability of signal transmission Conventional solution • Use of phase-locked-loop oscillator configuration • Use of primitive modulation format such as ASK (Amplitude-shift-keying) or FSK (Frequency-shift-keying) • Overcoming the problems of the necessity forLine of Sight (LoS) paths Hiroyo Ogawa, CRL

4. Millimeter-wave self-heterodyne technique Combining with the antenna diversity reception technique Our cost-effective solution for each Issue • Creation of small inexpensive millimeter-wave devices • Creation of stable millimeter-wave oscillator to achieve frequency stability of signal transmission • Overcoming the problems of the necessity for LoS paths Hiroyo Ogawa, CRL

5. Principle of Millimeter-Wave Self-Heterodyne Technique • Transmission of Local Oscillator (LO) along with RF modulation signals and down-conversion of received RF signals by square-law detection • Frequency offset and phase noise are completely cancelled out • Low-cost LO is available at Tx. and no LO is required at Rx. Hiroyo Ogawa, CRL

6. Demonstration system Transmitter and receiver developed for video signal transmission system Local-oscillator, mixer, amplifiers, BPF, and antenna included Square-law detector, amplifiers, and BPF included 110 mm 62 mm Receiver Transmitter (face and back) Hiroyo Ogawa, CRL

7. Phase noise Cancellation Effect 1. IF input signal/carrier characteristics 2. IF output signal/carrier characteristics Comparison of phase-noise power No phase noise degradation after mmW transmission !! Hiroyo Ogawa, CRL

8. An Example Simple mmW Application- mmW Video Transmission System - • Re-broadcasting of all the video channels • Point-to-Multipoint (P-MP) system structure with a broad-beam transmitter Hiroyo Ogawa, CRL

9. A Problem and Solution to the Interception by Blockage of LoS path • Millimeter-wave link requires LoS path • Signal interception by Blockage of Line-of-Sight path • Installing two millimeter-wave receivers (antenna diversity reception) • Reduced probability that the communication link is disconnected Hiroyo Ogawa, CRL

10. Easy in-phase signal combining by using self-heterodyne technique (Up/Down-conversion process never affects frequency of IF output from each receiver) Combining Antenna Diversity based on Millimeter-Wave Self-Heterodyne Technique IF out1 MMW Modulator Self-Heterodyne Receiver #1 Power Combiner Demodulator Transmitter for Self-Heterodyne IF out2 Self-Heterodyne Receiver #2 Using several self-heterodyning receivers enables combining diversity reception in a simple and low-cost manner Hiroyo Ogawa, CRL

11. Conclusion • Millimeter-wave Self-heterodyne technique is introduced • Self-heterodyne technique is a key technology for reducing the mmW system cost and for solving the problem of blockage of LoS path • Millimeter-wave Self-heterodyne technique is a promising PHY for mmW system Hiroyo Ogawa, CRL