information transmitted via the secondary cqich according to the present invention may occur as depicted in the following equation 3 information associated with feedback types capable of transmitting only snr associated information to the base station is transmitted to the mss via the u201c cqich_enhanced_alloc_ie u201d field the following table 24 exemplarily shows some parts of the u201c cqich_enhanced_alloc_ie u201d field including the above mentioned feedback type information meanwhile information transmitted via the secondary cqich can be used in various ways according to feedback types in other words the above mentioned secondary cqich can be used only for mimo mode selection if the secondary cqich is used only for the mimo mode selection a payload may occur as shown in the following table 25 although the use of the secondary fast feedback channel is requested by the bs to the mss the mss has an option to request the usage by sending a request message to the bs as apparent from the above description a method for receiving a non coherent detectable signal in a broadband wireless access system according to the present invention can transmit other signal s instead of a pilot signal when signal detection can be performed according to the non coherent detection scheme resulting in the implementation of increased transmission efficiency although the present invention is described in the context of mobile communication the present invention may also be used in any wireless communication systems using mobile devices such as pdas and laptop computers equipped with wireless communication capabilities the preferred embodiments may be implemented as a method apparatus or article of manufacture using standard.