CSCE 110 Lecture Notes - Lecture 2: Ieee 802.11Ac, Analog Signal, Wi-Fi

• School: Texas A&M University
• Department: Computer Sci & Engr
• Course: CSCE 110
• Professor: Luis David Meneses Macchiavello

Document Summary

Storing/transmitting one of two values is easier than three or more (e. g. , loud beep or quiet beep, reflection or no reflection: it is (cid:272)o(cid:373)(cid:373)o(cid:374) i(cid:374) high-speed data transmission, however, to use multi-bit representations such as. For example, wi-fi 802. 11ac uses 256- qam, where each symbol represents 8-bits. Example of digitization benefit: a(cid:374)alog sig(cid:374)al (cid:894)e. g. , audio, (cid:448)ideo(cid:895) (cid:373)a(cid:455) lose (cid:395)ualit(cid:455) voltage levels not saved/copied/transmitted perfectly, digitized (cid:448)e(cid:396)sio(cid:374) e(cid:374)a(cid:271)les near-perfect save/cpy/tran. (cid:862) a(cid:373)ple(cid:863) (cid:448)oltage at pa(cid:396)ti(cid:272)ula(cid:396) (cid:396)ate, sa(cid:448)e sample using bit encoding. Digitized audio: compression benefit: digitized audio (cid:272)a(cid:374) (cid:271)e (cid:272)o(cid:373)p(cid:396)essed.