The chapter discusses channel models for fixed wireless applications, emphasizing the importance of accurate descriptions of the wireless channel in assessing technology for broadband fixed wireless services. The models are tailored to multi-cell architectures with Non-Line-of-Sight (NLOS) conditions, typical scenarios, and key parameters such as path loss, multipath delay spread, fading characteristics, Doppler spread, and interference. The Hata-Okumura model is widely used for path loss prediction in macrocellular environments, but it has limitations in hilly or wooded terrain. An alternative model is proposed to address these issues, covering three common terrain categories. Correction terms are introduced to adjust the model for different frequencies and receive antenna heights. The Cost 231 Walfish-Ikegami (W-I) model is also discussed for flat suburban and urban areas, showing good agreement with experimental data. The chapter further covers multipath delay profiles, fading characteristics, Doppler spectrum, and co-channel interference. It introduces the concept of the Antenna Gain Reduction Factor (GRF) and provides a modified Stanford University Interim (SUI) channel model for simulations and design. The models are validated through extensive measurements and are expected to be applicable in the 1-4 GHz frequency range.The chapter discusses channel models for fixed wireless applications, emphasizing the importance of accurate descriptions of the wireless channel in assessing technology for broadband fixed wireless services. The models are tailored to multi-cell architectures with Non-Line-of-Sight (NLOS) conditions, typical scenarios, and key parameters such as path loss, multipath delay spread, fading characteristics, Doppler spread, and interference. The Hata-Okumura model is widely used for path loss prediction in macrocellular environments, but it has limitations in hilly or wooded terrain. An alternative model is proposed to address these issues, covering three common terrain categories. Correction terms are introduced to adjust the model for different frequencies and receive antenna heights. The Cost 231 Walfish-Ikegami (W-I) model is also discussed for flat suburban and urban areas, showing good agreement with experimental data. The chapter further covers multipath delay profiles, fading characteristics, Doppler spectrum, and co-channel interference. It introduces the concept of the Antenna Gain Reduction Factor (GRF) and provides a modified Stanford University Interim (SUI) channel model for simulations and design. The models are validated through extensive measurements and are expected to be applicable in the 1-4 GHz frequency range.