diversity

Maximum Ratio Combining (MRC): Getting the Absolute Most from Your Antennas

by

MRC weights each diversity branch by its channel gain to maximize post-combiner SNR — formula, intuition, and comparison to selection combining.

Selection combining diversity — pick the strongest branch (Matlab intuition)

by

Selection combining: choose the receive branch with highest SNR each fade, BER improvement vs single-antenna Rayleigh, and when SC is enough vs MRC.

SIMO receive-diversity channel models — from one transmit antenna to several receivers

by

MIMO — Diversity path 1. Intro → 2. Diversity vs mux → 3. SIMO → 4. Selection combining → 5. MRC Tools: Diversity & multiplexing demo Introduction Turn off every transmit antenna but one, and keep several receive antennas. That SIMO setup is the cleanest way into spatial diversity in class: no space-time code to … Read more

Model and characterize MIMO channels

by

MIMO — Capacity path 1. Intro → 2. Channel model → 3. SISO capacity → 4. Ergodic SISO → 5. MIMO capacity Tools: Shannon calculator Introduction Capacity formulas and diversity analyses assume you already have a channel model. Skip that step, jump straight to \(\log\det\), and it is hard to see why correlated antennas multiplex … Read more

Introduction to Multiple Antenna Systems

by

MIMO — Diversity path 1. Intro → 2. Diversity vs mux → 3. SIMO → 4. Selection combining → 5. MRC Tools: Diversity & multiplexing demo MIMO — Capacity path 1. Intro → 2. Channel model → 3. SISO capacity → 4. Ergodic SISO → 5. MIMO capacity Tools: Shannon calculator Introduction If you have … Read more