Books about the basic principle of QAM modulation and de-modulation

Hello all, Recently I am designing a DVB_C tuner, firstly I want to understand the basic principle of QAM modulation and de-modulation. Can anyone recommend some books about QAM and DVB_C tuner? Thanks

For the QAM, you can find it out from digital or RF communication text.
Such like,
Digital communications by Proakis
Communication systems by Haykin
Wireless communication by Rappaport
RF microelectronics by Razavi