Maximum Ratio Combining (MRC): Getting the Absolute Most from Your Antennas
MRC weights each diversity branch by its channel gain to maximize post-combiner SNR — formula, intuition, and comparison to selection combining.
Multiple antenna systems
Understanding Selection Combining: The Simplest Way to Fight Fading
MIMO — Diversity path 1. Intro → 2. Diversity vs mux → 3. SIMO → 4. Selection combining → 5. MRC Tools: Diversity & multiplexing demo Introduction Selection combining is the diversity scheme you can explain at a whiteboard in one minute: measure the SNR on each antenna, keep the best, ignore the rest. The … Read more
SIMO receive-diversity channel models — from one transmit antenna to several receivers
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
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
Diversity techniques and spatial multiplexing
MIMO — Diversity path 1. Intro → 2. Diversity vs mux → 3. SIMO → 4. Selection combining → 5. MRC Tools: Diversity & multiplexing demo Introduction We already wrote \(\mathbf{y}=\mathbf{Hx}+\mathbf{n}\) and noted that space can buy reliability or rate. Can you maximise both at once? In general, no: you can have some of each, … Read more
Introduction to Multiple Antenna Systems
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