Community Research and Development Information Service - CORDIS

Periodic Report Summary 1 - CORPA (COgnitive Radio Platform and Algorithms)

A summary description of the project objectives:
The project objectives are to design, develop, and demonstrate the receiver side of a cognitive radio (CR) platform that facilitates the realization of RF front-end functions for military and commercial communications systems. The CR receiver will be more power efficient and have wider bandwidth capability than current solutions. We also propose secure cooperative sensing algorithms, which will be implemented in this CR platform. This removes the need for custom-designed RF transceivers for each radio system. Moreover, this reconfigurability allows upgrades to future standards and technologies in the field. The CR platform will be deployable in both military communication equipment as well as commercial smartphone systems. GPS, border RADAR, and forward looking ground penetration RADAR could also be implemented using the proposed CR platform. Additionally, it will meet the requirements of commercial systems such as GSM, WCDMA, LTE including LTE-A, and Wi-Fi. This will be a disruptive technology and a currently missing central component for the deployment of mesh and ad-hoc CR networks both for military and commercial applications. The software defined radio (SDR) based transceiver will reduce the procurement costs for military applications such as radios, RADAR, electronic jamming, and signal intelligence as well as for commercial smartphones, tablets, and other devices.

A description of the work performed since the beginning of the project:
Cognitive receiver:
We have proposed a cognitive receiver, which is compliant with commercial systems such as GSM, WCDMA, LTE including LTE-A, and Wi-Fi as well as military communication equipment including GPS, border RADAR, and forward looking ground penetration RADAR. The prototype system is configurable to operate over the wide frequency range of 400MHz to 6GHz, divided into three frequency bands: 400MHZ-800MHZ, 800MHz-1.6GHz, 1.6GHz-3.2GHz, and 3.2GHz-6GHz. In these frequency bands, the prototype is able to achieve the functionality of many different radio systems: GSM, WCDMA, LTE in multiple bands, WiFi, and UHF/L-band government radio systems.

Secure Cooperative Sensing Algorithms:
The primary user emulation (PUE) attack is a serious security problem in cognitive radio (CR) networks. There exist three types of PUE attackers: 1) a selfish one, which aims at maximizing its selfish usage of channel resource; 2) a malicious one, which points for obstructing the operation of CR network; and 3) a mixed one, which is between a selfish and malicious PUE attacker. For combating a selfish PUE attacker, we have proposed a channel surveillance process in order to determine active user’s identification and so selfish PUE attacker. An extra-sensing process has to be implemented for observing new opportunities to access the channel and so for mitigating the malicious PUE attacker’s effect. Relevant strategies for deploying the above processes are obtained through a game theory-based analysis and the exhibition of equilibrium.

A description of the main results achieved so far:

CR Receiver Architecture and design:
We have proposed and designed a direct RF to digital delta sigma receiver covering a frequency range from 400 MHz to 6GHz. The receiver uses a 25% duty-cycle current-driven passive mixer and reconfigurable 2nd/4th passive/active loop filter. The receiver is designed in 65nm CMOS technology, operating at different center frequencies (0.4/0.85/1.2/2.1/2.4/3.6/4.0/6.0 GHz). The designed receiver achieves a noise figure of 9db at highest gain, out-of-band80 MHz IIP3 of 10 dBm and 65 dB of peak SNDR in simulations.

Secure Cooperative Sensing Algorithms:
Using theoretical analysis and Lemke-Howson algorithms, we show the
Nash Equilibrium (NE) strongly depends on the network demand, the availability of the spectrum resource, and the type of the attacker. We also show the proposed defensive strategies (surveillance and extra sensing) are efficient for combating the effects of PUE attackers. The sequence-form representation method, which overcomes the limitation of the conventional method of running time in multi-channel context, is then adopted to determine the Nash Equilibrium.
Since the intelligent attacker can learn to adapt the surveillance strategy, in the aspect of a network manager, the question is how to lead the game to a higher benefit solution. We propose the network manager plays as a leader by committing to its surveillance strategy and forcing the attacker to be the follower based on Stackelberg model. The relevant strategy is analyzed through the Strong Stackelberg Equilibrium (SSE). Analytical and numerical results demonstrate that the network manager significantly improves its utility while reducing the computational time required to find the equilibrium point by playing the SSE strategy, leading to better protection against selfish PUE.

The expected final results and their potential impact and use:
The expected final results are to design the receiver side of a cognitive radio platform that facilitates the realization of RF front-end functions for military and commercial communications systems and to propose secure cooperative sensing algorithms, which can be implemented in the CR platform. Their potential impact and use is to remove the need for custom-designed RF transceivers for each radio system and to automatically upgrade to future standards and technologies in the field. The CR platform can be deployable in both military communication equipment as well as commercial smartphone systems.

Reported by

Institut Mines-Telecom
France

Subjects

Life Sciences
Follow us on: RSS Facebook Twitter YouTube Managed by the EU Publications Office Top