DS and FH
For DS, usually in market, they use coxeant (Rockwell) solution. For newcomer, likes Intel Levelone, she always use DS as SST link and the integration is very high (RF + baseband integrated in one chip), but if you need to have long talk range, you need a external power ampliifer. But usually Rockwell and Levelone won't support freelance, so ......
One more party will be Lanwave, she always work hard to improve the chips but no RF solution.
For FH, and also fast hopping, I think now bluetooth become the right solution.
Rayengine