1. A system, comprising: a channel emulator comprising one or more processors and accessing instructions executable by the processors including instructions that cause the channel emulator to generate radio channel conditions of live wireless base station signals in a simulation of a radio environment of a fielded wireless network, based on a record of captured radio signal data of a plurality of wireless base stations in the fielded wireless network, wherein the captured radio signal data includes multiple paths of a signal with at least attenuation and delay for each of the multiple paths; a network emulator coupled to the channel emulator, the network emulator providing data to the channel emulator for the simulation by the channel emulator, the network emulator comprising one or more processors and storing instructions executable by the processors including instructions that cause the network emulator to generate a simulation of network events of the fielded wireless network, wherein the radio channel conditions in the simulation of the radio environment are synchronized with the network events in the simulation of the fielded wireless network.