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Future high performance Earth Observation satellites in Low Earth Orbit (LEO) will be equipped with high rate telemetry architectures either based on X-Band (375MHz, from 8.025 GHz up to 8.4 GHz) in dual-polarization or on K-Band (25.5GHz up to 27 GHz); in particular, the migration to the K-Band is expected in case the available X-Band will not be able to sustain the mission requirements. They will...
Joint network-channel codes (JNCC) can improve the performance of communication in wireless networks, by combining, at the physical layer, the channel codes and the network code as an overall error-correcting code. JNCC is increasingly proposed as an alternative to a standard layered construction, such as the OSI-model. The main performance metrics for JNCCs are scalability to larger networks and...
This paper deals with full-diversity schemes for MIMO systems in a slowly-varying fading environment. We consider LDPC codes expressly designed for block-fading channels (rootcheck LDPC) and we couple them with spatial multiplexing, to show that they achieve diversity gain, unlike traditional LDPC codes. At the receiver, we consider an iterative turbo-like receiver, both with the optimal demodulator...
In wireless scenarios a simple and effective method to increase the reliability for time-varying channels is the hybrid automatic repeat request (H-ARQ) protocol. Recently, a H-ARQ scheme with cross-packet channel coding (CPC) has been proposed to increase the maximum coding rate at which full-diversity can be achieved. In this paper, CPC based on turbo codes is analyzed with EXIT charts. This allows...
Cooperative communications is a well known technique to yield transmit diversity in a multi-user environment. Network coding can increase the spectral efficiency in networks. These two techniques can be combined to achieve a double diversity order for a maximum coding rate Rc = 2/3 on the Multiple Access Relay Channel (MARC), where two sources share a common relay in their transmission to the destination...
Transmit diversity is necessary in harsh environments to reduce the required transmit power for achieving a given error performance at a certain transmission rate. In networks, cooperative communication is a well-known technique to yield transmit diversity and network coding can increase the spectral efficiency. These two techniques can be combined to achieve a double diversity order for a maximum...
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