The difference between mixer in transmitter and receiver

Recently I want to design a mixer to upconvert base band signal to 1.6GHz,can you recommend some good references or papers?
Since almost every book discuss mixers in receiver,I wonder the difference of mixer in transmitter and receiver?
Thanks very much!

in transmitter u get an already large signal and i guess u mostly care about linearity not gain but in the Rx the signal is small (comparable to noise) and u care about gain and NF as any block in the front-end so that u don't educe the overall NF of the system and i think u care about lineairty but not like the upconversion mixer as the downconverge mixer has a small input signal which will naturally have a good linearity.

Instead to look for Transmitter Mixer, search for Direct Conversion IQ Modulator:

http://www.analogzone.com/hft_1202.pdf
http://rfdesign.com/mag/601RFDF4.pdf