The report contains a general literature survey performed this year within the Radio Channel project. The report starts out with a review of the development of the parabolic equation technique (PE) for wave propagation calculations. Some new works are also presented dealing with PE techniques as well as other techniques for wave propagation calculations. Further, some interesting radio channel models are discussed, in two cases also with tests of model software. Finally, a few papers are presented on new channel sounding equipments with interesting capabilities. Detailed conclusions and recommendations for future project activities are presented elsewhere. The Radio Channel project started in January 2000 and is one of the basic fields of work at the Department of Communication Systems. The project this year has had two major branches of activities; wave propagation and channel models. Apart from the direct result production for the Armed Forces the project has a wider responsibility to monitor the international development in the area and to maintain and build the competence within the organisation. These two activities are very important parts of the project to ensure that the know-how is available for Defence needs also in the long term. The literature studies also are an indispensable part in the development of the project plans. In the future, this kind of survey of the international development in the field will be made annually.