## 1 Introduction
Thus, the implementation of FPGA platforms in addition to ARM processors can be enabled to reconfigure a portion of hardware algorithms to process different communication standards and conditioning signal algorithms in a flexible test platform [13]. In systems that operate in the 2-GHz band and 5G NR, the PAPR brings another restriction related to spectral efficiency due to the back off of the PA and its operating point, which must be greater than the signal introduced to the PA to avoid saturation [14; 15], CFR is used to improve the spectral efficiency for concurrent bands in terms of efficiency and power handling [7], the main function of a CFR analysis stage in the transmitter stage is to improve the spectral efficiency for concurrent bands in term of power management [16]. The clipping technique is developed based on limiting the signal to the desired power level in the transmitter without changing the phase. In this work, an implementation with an FPGA evaluation board was developed. It was demonstrated that a CFR technique aimed at addressing PAPR reduction for LTE commercial RF PAs. It is important to note that in LTE systems, a large PAPR is not such a problem for signal transmission, however, it has a direct impact on the efficiency of the RF PA at the transmitter. In order to compensate the receiver side of the transmitter impairment, some works involve the clipping technique. Various works on PAPR reduction techniques have been presented in the literature, in [17], for OFDM-based digital multiplexing, validating the results with a PA for ACPR less than \(-55\) dBc. Ref. [18] explores clipping and filtering applied to single-carrier and two-carrier 20-MHz LTE signals as the stimulus, the developed CFR technique improves the spectral regrowth using a testbench of a device under test (DUT) operating at 3.3-3.8 GHz. This work focuses on the design and implementation stage of a transceiver that operates in the 2 GHz band for LTE applications. In the implementation stage, clipping-based signal analysis is used to reduce the PAPR of the system, in addition to CFR for managing the PAPR which is described by the complementary cumulative distribution function (CCDF) statistical measure of the peak power. In [19; 20], the clipping method is used to compensate the output of the transmitter system using a correlation factor to minimize the floor error, based on the transformation of the amplitude to a defined distribution, using a conventional clipping process, followed by filtering. In [21] an analytical work based on the reconstruction of iterative clipping is presented; this scheme performs the reconstruction of the non-linear distortion of a digital multiplexing system such as OFDM. In [22], experimental results applied to a WiMax 802.16e transmitter are presented, which through the clipping process improves the energy use of the amplification stage. Additionally, in [23], a clipping application for Internet of things (IoT)-based 5G or IoT-based machine type communication is presented to link a low-cost transmitter with a high-level receiver and compensate for the imbalances. The remainder of this paper is organized as follows: Section 2 introduces the CFR technique related to the joint PAPR clipping. Experimental results to demonstrate the performance of the aforementioned CFR algorithm are discussed in Section 3. In addition, further details about the testbed setup used for the specific experimental tests validation of the CFR method and predistortion model are given in Section 4. Finally, in Section 5 the conclusion and future work are given.