Well, you can mostly derive all of the block level specifications from the Protocol specification. Here is a procedure.
1-Read the entire specification. Make note of everything that seems to be radio performance related. For example, adjacent channel interferer, Maximum input power, minimun input power, channel changing time, etc.
1a- Make an assumption as to the receiver architecture you will use. Dual conversion, single conversion, direct conversion, etc.
2-Start calculating what you can. For example, From the minimum input power, you can derive the Maximum Receiver system noise figure. From the Adjacent channel interfer, you can calculate the LO Phase noise, the Channel filtering specifications, and the A/D Converter bit width. A two tone interfer test will give you a receiver linearity specification.
3-Once you have specifications for the receiver as a black box, you can go in and distribute the gain/Noise figure/Filter Bandwidth/Linearity through the system as you see fit.
4-Share the block level specifications with the IC design team.
5-Once they have stopped calling you an idiot for specifying impossible blocks, ask them what they can design.
6-Go back to your gain distribution, plug in blocks that you can build, and then re-do the design.
7 Repeat 4, 5, and 6 until everyone is happy.
Here are a couple of papers that my prove helpful.