802.11 introduction.ppt

EVM Measured by VSA * 國碁電子 IEEE 802.11a/b/g Introduction 陳隆寶 Roger.lp.chen@ Agenda 1.WLAN(OSI) 1. 802.11a/b/g Table 2. 802.11b/g Channel Plan 3. 802.11b Transmit Spectrum Mask 4. 802.11a Channel Table Plan 5. 802.11a Spectrum Mask 6. 802.11a/g Rate Dependent Parameters 7. Constellation 8. EVM 1.MAC/ baseband 2.RF IC 3.PA 802.11a/b/g Table BPSK: binary pulse code modulation(二元脈衝電碼調制) QPSK: Quaternary phase shift keying(四相 移相 鍵控調制) CCK: Complementary Code Keying (互補碼鍵控) OFDM: Orthogonal Frequency Division Multiplexing(正交劃頻多工調變 ) MAC: media access control(媒體存取控制) CSMA/CS: Carrer sense multiple access/Collision avoidance(載波感測多重存取/ 碰撞避免) 802.11 b/g Channel Plan Non-overlapping Overlapping 802.11b Transmit Spectrum Mask 802.11b Transmit Spectrum Mask 802.11a Frequency Channel Plan 802.11a/g Transmit Spectrum Mask 802.11a/g Transmit Spectrum Mask 802.11 a/g Rate Dependent Parameters Constellation Constellation - BPSK QPSK 16 QAM Constellation Constellation - 64 QAM EVM 802.11a/g EVM Specification *