Differences When WiFi 7 QCN9274 5G Module Supports 5 MHz BandDifferences When WiFi 7 QCN9274 5G Module Supports 5 MHz Bandwidth Basic Background The standard QCN9274 5G module natively supports only 20/40/80/160 MHz bandwidth. The 5 MHz mode is a custom narrowband feature enabled via modified industrial firmware and radio extensions, designed exclusively for long-distance industrial IoT and private dedicated networks — it operates on an entirely different design philosophy from wideband channels used in consumer-grade Wi-Fi. 1. Throughput & Spectral Efficiency (Core Distinction) Wi-Fi OFDM subcarrier count scales linearly with channel bandwidth; a 5 MHz channel carries just 1⁄4 the subcarriers of a standard 20 MHz channel. 5 MHz Narrowband Mode Theoretical single-stream throughput drops to roughly one-quarter of a 20 MHz channel, drastically cutting overall throughput on 4×4 MIMO hardware. Limited to low-order modulation schemes (primarily BPSK/QPSK); stable 4096-QAM operation is...
wireless/router/wifi6/802.11ac/802.11ax