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The framework is based on the assumption that data exchanged over the crosshaul interface between the lower and higher parts of the physical layer have the form of frequency\u2010domain orthogonal frequency division multiplexing (OFDM) subcarriers. Therefore, it is proposed to simulate the effects of a wireless fading channel directly in the frequency domain, instead of the conventionally selected time domain. This approach leads to complexity reduction of the channel simulation model by minimizing the number of required FFT\/IFFT operations, at the cost of simulation accuracy in high\u2010mobility and high\u2010delay spread scenarios. Analysis of bit error ratio (BER) and block error ratio (BLER) metrics obtained using both time\u2010 and frequency\u2010domain channel models is presented in order to validate the proposal and evaluate the accuracy loss caused by the usage of nonideal frequency\u2010domain models. The frequency\u2010domain methods are compared against the conventional wide sense stationary uncorrelated scattering (WSSUS) model implementation based on the tapped delay line (TDL). It is shown that the utilization of improved frequency\u2010domain models instead of the block\u2010fading model substantially decreases the BER\/BLER prediction error in specific scenarios.<\/jats:p>","DOI":"10.1002\/ett.4134","type":"journal-article","created":{"date-parts":[[2020,10,5]],"date-time":"2020-10-05T00:31:02Z","timestamp":1601857862000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Validation of cloud\u2010radio access network control unit with intra\u2010PHY architecture: Hardware\u2010in\u2010the\u2010loop framework based on frequency\u2010domain channel models"],"prefix":"10.1002","volume":"32","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-8054-710X","authenticated-orcid":false,"given":"Grzegorz","family":"Cisek","sequence":"first","affiliation":[{"name":"Department of Telecommunications AGH University of Science and Technology  Cracow Poland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Tomasz P.","family":"Zieli\u0144ski","sequence":"additional","affiliation":[{"name":"Department of Telecommunications AGH University of Science and Technology  Cracow Poland"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2020,10,4]]},"reference":[{"key":"e_1_2_8_2_1","doi-asserted-by":"publisher","DOI":"10.1007\/978-3-319-61869-2"},{"key":"e_1_2_8_3_1","doi-asserted-by":"crossref","unstructured":"IkunoJC WrulichM RuppM. 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