## 8 Conclusions  
This paper has provided a theoretical tracking performance evaluation method for unmatched receiving. Firstly, the mathematical model of the DLL in GNSS receivers has been generalized to consider the mismatch of the local despreading code chip waveform. Based on the unmatched tracking  
Figure 9: Average range error envelope of MBOC(6,1,1/11), under matched receiving and BOC\({}_{11}\)-like unmatched receiving. (**a**) Double-sided receiving bandwidth is 40 MHz; (**b**) Double-sided receiving bandwidth is 10 MHz. MDR is \(-5\) dB. model, performance evaluation criteria for code tracking error have been derived, which are notable in the equivalent Gabor bandwidth and anti-interference rate. These criteria decouple from the less related factors and concentrate on the essential factors of the GNSS signal, which characterizes the inherent properties of a signal. Then, the proposed evaluation criteria have been applied to evaluate two split-spectrum signals ACE-BOC and MBOC. The signal performance of acquisition, tracking and interference resistance have been assessed and compared among different receiving strategies. Useful information can be derived by using the evaluation criteria, which is helpful for signal design and receiver configuration. This work was supported by the National Foundation of China (NSFC), Grant 61201190. The work presented in this paper was carried out in collaboration with all authors. [PERSON] and [PERSON] provided the initial ideas. [PERSON] worked out the derivation of evaluation criteria and worked together with [PERSON] to complete the performance analysis and to write the manuscript. [PERSON] coordinated the study and critically reviewed the manuscript. The authors declare * (3) [PERSON]; [PERSON] Predicting performance of direct acquisition for the M-code signal. In Proceedings of the 2000 National Technical Meeting of the Institute of Navigation, Anaheim, CA, USA, 26-28 January 2000; pp. 574-582. * (4) [PERSON]; [PERSON]; [PERSON]; [PERSON] BOC (x, y) signal acquisition techniques and performances. In Proceedings of the 16 th International Technical Meeting of the Satellite Division of the Institute of Navigation (ION GPS/GNSS 2003), Portland, OR, USA, 9-12 September 2003; pp. 188-198. * (5) [PERSON]; [PERSON] Dual estimate receiver of binary offset carrier modulated signals for global navigation satellite systems. _Electron. Lett._**2007**, 43, 877-878. [CrossRef]
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