Transmit-reference methods in software defined radio platforms for communication in harsh propagation environments and systems thereof

1. A Radio Frequency (RF) communications system, comprising:

a satellite uplink base station, wherein the satellite uplink base station comprises:

a router;

a power supply configured to provide power to the satellite uplink base station; and

a broadband global area network (BGAN) satellite uplink configured to maintain a satellite uplink connection while the satellite uplink is in motion, wherein the BGAN satellite uplink is operatively coupled to the router; and

one or more ultra-wideband (UWB) radios, each UWB radio being a software-defined radio (SDR) system comprising a processor configured to execute software, the software being configured to cause the SDR system to:

perform an interference modulation technique to adaptively jam one or more undesired signals, wherein the performing the interference modulation technique to adaptively jam the one or more undesired signals includes:

determining one or more characteristics of the one or more undesired signals, and

generating one or more jamming signals based on the one or more determined characteristics of the undesired signals,

wherein each of the one or more jamming signals are characterized by a signal bandwidth ranging from narrow-band to ultra-wideband,

wherein the one or more jamming signals are configured to jam the undesired signals simultaneously, and

wherein the one or more jamming signals comprise directional countermeasure signals; and

perform Transmit-Reference (TR) modulation in real-time by adaptively changing each of the following parameters of the SDR system, singly or in combination, in real-time:

an operating frequency,

a pulse shape,

a delay between pulses,

a delay between symbols,

a pulse width,

a modulation scheme,

an encryption,

an error correction, and

a power output,

wherein the one or more UWB radios are each configured to communicate with the satellite uplink base station using wireless communications that are controlled by the SDR system thereof,

wherein the one or more UWB radios each comprise one or more interfaces for coupling to one or more endpoint devices,

wherein at least one of the one or more UWB radios facilitate communication between the satellite uplink base station and the one or more endpoint devices when the one or more endpoint devices are coupled to the at least one UWB radio,

wherein the at least one of the one or more UWB radios facilitate communication between the satellite uplink base station and the one or more endpoint devices using one or more of a primary communications network and a backup communications network,

wherein at least one of the primary communication network and the backup communications network is an Emergency Communications Network,

wherein the at least one of the one or more UWB radios are configured to implement one or more interference modulation techniques in software, at least one of the interference modulation techniques being configured to mitigate narrowband interference external to the UWB radios,

wherein the one or more UWB radios are configured to use multipulse modulation,

wherein the multipulse modulation comprises:

transmitting a data pulse separated in time from a reference pulse,

wherein the data pulse is modulated with data,

wherein the reference pulse is unmodulated,

wherein the data pulse and the reference pulse are wideband pulses chosen from a group consisting of: Gaussian, chirp, and Hermite-based, and

wherein the data pulse is modulated with data based on a relative polarity of the data pulse and the reference pulse,

wherein the one or more UWB radios are configured to use multipath receivers to enhance a signal-to-noise (SNR) ratio, and

wherein the one or more endpoint devices each comprise:

a commercial off the shelf (COTS) device that is configured to perform data and voice communications; and

an interface for coupling the endpoint device to the one or more UWB radios.

2. The Radio Frequency (RF) communication system of claim 1 , wherein the directional countermeasure signals are sent only towards a direction of a source of the undesired signals.