Structured lessons, deep-dive topic hubs, platform and radio hardware references, and daily wireless news written in plain English. From your first link budget to the 5G NR physical layer.https://www.wirelessfieldguide.com/en-gbhttps://www.wirelessfieldguide.com/learn/beginner/01-what-is-a-radio-link/https://www.wirelessfieldguide.com/learn/beginner/01-what-is-a-radio-link/The parts of every radio link from bits to antenna and back, what the carrier frequency changes, why bandwidth matters, and a first working use of decibelsSun, 15 Nov 2026 00:00:00 GMThttps://www.wirelessfieldguide.com/learn/beginner/02-complex-baseband-and-iq/https://www.wirelessfieldguide.com/learn/beginner/02-complex-baseband-and-iq/Why radios represent signals as I and Q, how mixing moves a signal to and from the carrier, what sampling rate a complex signal needs, and what a negative frequency isSun, 15 Nov 2026 00:00:00 GMThttps://www.wirelessfieldguide.com/learn/beginner/03-decibels-and-link-budgets/https://www.wirelessfieldguide.com/learn/beginner/03-decibels-and-link-budgets/Decibel arithmetic in dB, dBm, dBW and dBi, the Friis transmission equation, free-space path loss checked against ITU-R P.525, and a link budget calculator in numpySun, 15 Nov 2026 00:00:00 GMThttps://www.wirelessfieldguide.com/learn/beginner/04-noise-snr-and-capacity/https://www.wirelessfieldguide.com/learn/beginner/04-noise-snr-and-capacity/Where the −174 dBm/Hz thermal noise floor comes from, how noise figure and cascaded stages set receiver sensitivity, and what Shannon capacity says about bandwidth and powerSun, 15 Nov 2026 00:00:00 GMThttps://www.wirelessfieldguide.com/learn/beginner/05-digital-modulation/https://www.wirelessfieldguide.com/learn/beginner/05-digital-modulation/Map bits to BPSK, QPSK and 16-QAM symbols with Gray coding, detect them in noise, and measure bit error rate against Eb/N0 by Monte Carlo simulation compared with theorySun, 15 Nov 2026 00:00:00 GMThttps://www.wirelessfieldguide.com/learn/beginner/06-pulse-shaping-and-matched-filters/https://www.wirelessfieldguide.com/learn/beginner/06-pulse-shaping-and-matched-filters/Why rectangular pulses waste spectrum, how raised-cosine and root-raised-cosine pulses avoid intersymbol interference, and why the receiver filter must match the transmit pulseSun, 15 Nov 2026 00:00:00 GMThttps://www.wirelessfieldguide.com/learn/beginner/07-fading-channels/https://www.wirelessfieldguide.com/learn/beginner/07-fading-channels/Multipath, Rayleigh and Rician fading, Doppler and coherence time, delay spread and coherence bandwidth, and how two-antenna diversity changes the BER curve, all simulated in numpy against theorySun, 15 Nov 2026 00:00:00 GMThttps://www.wirelessfieldguide.com/learn/beginner/08-ofdm-from-scratch/https://www.wirelessfieldguide.com/learn/beginner/08-ofdm-from-scratch/Build a complete OFDM link in numpy, with IFFT modulation, a cyclic prefix, a multipath channel, pilot-based channel estimation and one-tap equalisation, and measure its bit error rate against theorySun, 15 Nov 2026 00:00:00 GMThttps://www.wirelessfieldguide.com/learn/beginner/09-first-gnu-radio-flowgraph/https://www.wirelessfieldguide.com/learn/beginner/09-first-gnu-radio-flowgraph/Build a headless GNU Radio 3.10 flowgraph in Python that sends QPSK through root-raised-cosine filters and noise, demodulates it and counts bit errors, and see how it maps to GNU Radio CompanionSun, 15 Nov 2026 00:00:00 GMThttps://www.wirelessfieldguide.com/learn/beginner/10-recording-and-reading-iq/https://www.wirelessfieldguide.com/learn/beginner/10-recording-and-reading-iq/Raw IQ sample formats from cf32 to cu8, SigMF metadata, writing and reading a synthetic capture in numpy, finding a burst in its spectrogram, and recording from a real SDR with SoapySDRSun, 15 Nov 2026 00:00:00 GMThttps://www.wirelessfieldguide.com/projects/qpsk-modem-ber/https://www.wirelessfieldguide.com/projects/qpsk-modem-ber/Build a QPSK transmitter and receiver in NumPy with root-raised-cosine pulse shaping, an AWGN channel and a matched filter, then measure the bit error rate from 0 to 10 dB Eb/N0 against theory.Sun, 15 Nov 2026 00:00:00 GMThttps://www.wirelessfieldguide.com/projects/gnuradio-fm-receiver/https://www.wirelessfieldguide.com/projects/gnuradio-fm-receiver/Generate an FM test signal in NumPy, save it as SigMF, demodulate it with a headless GNU Radio 3.10 flowgraph and check the recovered tone frequency, deviation and audio SNR in code.Sun, 15 Nov 2026 00:00:00 GMThttps://www.wirelessfieldguide.com/projects/lorawan-link-budget-coverage/https://www.wirelessfieldguide.com/projects/lorawan-link-budget-coverage/Compute EU868 LoRaWAN uplink sensitivity, time on air, duty-cycle limits and range per spreading factor from Semtech, LoRa Alliance, ITU-R and 3GPP sources, then map coverage around one gateway in NumPy.Sun, 15 Nov 2026 00:00:00 GMThttps://www.wirelessfieldguide.com/projects/ofdm-link-channel-estimation/https://www.wirelessfieldguide.com/projects/ofdm-link-channel-estimation/Build a 64-subcarrier OFDM link in NumPy over a multipath Rayleigh channel, estimate the channel from comb pilots by least squares, interpolate, equalise with one tap per subcarrier and measure MSE and BER.Sun, 15 Nov 2026 00:00:00 GMThttps://www.wirelessfieldguide.com/news/2026-11-11-optus-nokia-asymmetric-900-mhz-5g/https://www.wirelessfieldguide.com/news/2026-11-11-optus-nokia-asymmetric-900-mhz-5g/A live-network test of asymmetric channel bandwidth in band n8 raised download speeds by up to 91% outdoors and 51% indoors, according to Optus, using a commercial phone with a new MediaTek chipset.Wed, 11 Nov 2026 00:00:00 GMThttps://www.wirelessfieldguide.com/news/2026-11-09-rakuten-ast-direct-to-device-japan/https://www.wirelessfieldguide.com/news/2026-11-09-rakuten-ast-direct-to-device-japan/Rakuten AST will deploy mid-band satellites for service to ordinary smartphones in Japan by the end of March 2029, backed by up to 148 billion yen from the MIC J-LEO project.Mon, 09 Nov 2026 00:00:00 GMThttps://www.wirelessfieldguide.com/news/2026-11-09-verizon-7-ghz-6g-field-test-indoor/https://www.wirelessfieldguide.com/news/2026-11-09-verizon-7-ghz-6g-field-test-indoor/The Verizon and Ericsson pre-standard call used a 400 MHz carrier at 7 GHz. Verizon's CTO said indoor results were "not super encouraging" and that more antenna elements and EIRP would be needed.Mon, 09 Nov 2026 00:00:00 GMThttps://www.wirelessfieldguide.com/research/2026-11-09/https://www.wirelessfieldguide.com/research/2026-11-09/Eight arXiv papers on indoor multi-band channel measurements, an over-the-air neural 5G receiver, a PlutoSDR radar target simulator, UAV channel data, satellite D2D interference, Wi-Fi 8, LDPC and OTFS.Mon, 09 Nov 2026 00:00:00 GMThttps://www.wirelessfieldguide.com/news/2026-11-06-futureg-rapid-isac-awards/https://www.wirelessfieldguide.com/news/2026-11-06-futureg-rapid-isac-awards/The RAPID programme puts more than $50 million into integrated sensing and communications prototypes over 24 months, with operators, RAN vendors and universities on the teams.Fri, 06 Nov 2026 00:00:00 GMThttps://www.wirelessfieldguide.com/news/2026-11-05-etsi-gr-isc-005-computing-for-isac/https://www.wirelessfieldguide.com/news/2026-11-05-etsi-gr-isc-005-computing-for-isac/ETSI GR ISC 005, from the ISAC Industry Specification Group, names five key issues and six candidate solutions for processing sensing data inside a 6G network, three of them about over-the-air computation.Thu, 05 Nov 2026 00:00:00 GMThttps://www.wirelessfieldguide.com/news/2026-11-04-bluetooth-hdt-adopted-core-7-0/https://www.wirelessfieldguide.com/news/2026-11-04-bluetooth-hdt-adopted-core-7-0/Bluetooth HDT, an optional part of Core 7.0, adds a π/4 QPSK, 8PSK and 16QAM physical layer with convolutional coding. Only the 2 to 4 Mbit/s modes are mandatory.Wed, 04 Nov 2026 00:00:00 GMT