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SFP Tranceivers Communication System Design

Today, wireless systems are everywhere, SFP Tranceivers and the number of wireless devices and services continues to grow. Design a complete RF system is an interdisciplinary design challenge, analog RF front end is one of the most critical part. However, the introduction of integrated RF transceivers such as the AD9361 significantly reduces RF challenges for such designs. These transceivers provide a digital interface for analog RF signal chains, allowing easy integration into ASICs or FPGAs for baseband processing.

except for a direct RF system.and the opposite direction is a mirror image of the data path. SFP Tranceivers The proposed baseband processor, as proposed herein, allows data to be processed so that it is wirelessly transmitted between two RF systems.

Note that the carriers are independent of each other and are not synchronized with each other. Thus, there is a phase and frequency offset between the transmitting and receiving carriers. This will adversely affect the demodulation of the receiver. An important issue is signal inversion, and the quadrature signal may reverse its effect because the offset will be merged and drifted on a regular basis.SFP Tranceivers A simple way to overcome this uncertainty is to repeat the same data on the two orthogonal signals.

In most cases, the RF front-end interface to the BBP is DAC and ADC. These are digital interfaces for analog signals. Therefore, the data can not be simply sent to the DAC input, SFP Tranceivers and the same data is expected to be obtained at the ADC output. The data is transmitted in serial form, mapping a single bit of data to the full resolution of the DAC. Likewise, the data is received in serial form and is demapped from the full resolution of the ADC. This provides ample redundancy. If these are 16-bit converters, the receiver will determine 1 or 0 from the possible 65536 data set. Only this, you can significantly simplify the decoding. SFP Tranceivers Data requires timing information, bit spacing. The maximum possible bit interval is the sampling period. In order to keep the receiver simple, it takes enough time to decode the signal and make a decision. The simplest timing recovery method is zero crossing and peak detection. In this case, the peaks will be inconsistent. Therefore, select the zero crossing for bit interval detection and tracking. There are also carrier differences between the two systems. In some cases, SFP Tranceivers at any point in the user's data, the sample may be blurred. Four samples are set for every half sinusoidal signal, and the interval is set to 8 samples. Thus, SFP Tranceivers the effective transfer rate is the sampling frequency divided by 8.

The receiver also supports statistical counters, SFP Tranceivers such as the number of received, discarded, or corrected packets. These counters are used to measure and monitor performance metrics, including bit error rate and effective data rate.

The data is sent and received as a packet in serial form. The packet carries the preamble and CRC. The data is modulated and demodulated by BPSK on the intermediate quadrature signal before the transceiver device.


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