Physical Layer Implementation

Our work focuses primarily on the physical layer. We have implemented the “Layer 1” functions, procedures and algorithms, as defined in the LTE standard. These aspects are key to successfully decoding LTE downlinks and uplinks. Our LTE-S hardware platform forms the basis for this implementation.

Algorithms

Using our extensive knowledge of physics and telecommunications technology, particularly in the field of wireless transmission technology, we have developed complex algorithms that deliver excellent performance. One example: our algorithms for channel estimation and channel correction of the reception signal. This enables us to correct radio channel interference by analysing the radio channel with specific known sequences, and then using these results, to correct the distorted signal at the reception unit.

Simulation

We use simulations at the start of each new development, and continue to use them throughout the process. We generate our simulations within powerful computing environments such as MATLAB, which offers many of the required functions.

Each simulation depicts the necessary architecture at the system level, and gives an overview of the entire system and its individual sub-systems. In addition, we use simulations to generate test sequences and to verify the algorithms and functions that we develop.

By exploiting simulations, we gain a better understanding of each process and can thoroughly document even the most complex of processes.

Test and verification

The complete Layer 1 and Layer 2 decoding of the LTE downlink and uplink is performed in real time. For the hardware platform, we utilize FPGA / DSP (LTE-S platform) and others. We carry out the development, simulation, implementation, testing and verification of LTE signal processing (physical layer, MAC layer) on whatever hardware and within whatever parameters our client requires.