Reducing the number of RF chains in a multi-antenna system is a central effort in next generation communication systems, as the RF components grow more expensive and area consuming. This issue had been the subject of many of the latest researches in the communication area and is also of great interest in the industry side. One common method to allow for RF chains reduction is to shift some of the data processing to the analog side, using an analog combiner. The purpose of the analog combiner is to project the high number of analog samples to the low number of RF chains while preserving as much relevant information as possible.